Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
JF

John J. Freeman — 49 Patents

MAMannkind: 20 patents #10 of 146Top 7%
CTCytec Technology: 9 patents #40 of 326Top 15%
ETEmisphere Technologies: 5 patents #34 of 117Top 30%
STSeagate Technology: 3 patents #1,734 of 4,722Top 40%
MIMiniscribe: 2 patents #1 of 36Top 3%
ACAmerican Cyanamid: 2 patents #617 of 1,554Top 40%
MIMicrosemi: 2 patents #42 of 169Top 25%
OMOmniglow: 1 patents #10 of 16Top 65%
MTMonsanto Technology: 1 patents #1,973 of 1,657Top 120%
New Fairfield, CT: #5 of 222 inventorsTop 3%
Connecticut: #488 of 34,797 inventorsTop 2%
Overall (All Time): #55,592 of 4,157,543Top 2%
49 Patents All Time
John J. Freeman has been granted 49 US patents while listed as an inventor at Mannkind. The first was granted in 1986 and the most recent in November 2025. John J. Freeman ranks #55,592 of 4,157,543 US inventors in our database (top 1.3%). Patent records list John J. Freeman in New Fairfield, CT, US.

Patents per Year

Patents granted per year, 1986 to 2025Bar chart with a peak of 5 patents in 1999.peak 51986: 1 patents19861987: 1 patents1988: 1 patents1990: 1 patents19901992: 2 patents1994: 1 patents1995: 2 patents19951996: 1 patents1998: 4 patents1999: 5 patents19992000: 2 patents2001: 1 patents2003: 1 patents20032004: 2 patents2006: 1 patents2011: 1 patents20112013: 1 patents2014: 1 patents2015: 3 patents20152016: 1 patents2018: 2 patents2019: 1 patents20192020: 5 patents2022: 3 patents2023: 1 patents20232024: 1 patents2025: 3 patents2025

Issued Patents All Time

Showing 1–25 of 49 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12459903 Formation of n-protected 3,6-bis-(4-aminoalkyl)-2,5,diketopiperazine Adrienne Stamper, Melissa Heitmann 2025-11-04
12383552 Diketopiperazine microparticles with defined specific surface areas Marshall L. Grant, Grayson W. Stowell, Paul Menkin 2025-08-12
12202807 Methods for the synthesis of activated ethylfumarates and their use as intermediates Kelly Sullivan Kraft, Paul Serwinski, Vincent Pavia, Otto Phanstiel, Navneet Kaur 2025-01-21
12049453 Formation of N-protected 3,6-bis-(4-aminobutyl)-2,5-diketopiperazine through a cyclic alpha-N-protected amino ester Otto Phanstiel, William Elliot Bay, Kelly Sullivan Kraft 2024-07-30 $18,965,000
11607410 Diketopiperazine microparticles with defined specific surface areas Marshall L. Grant, Grayson W. Stowell, Paul Menkin 2023-03-21 $14,048,000
11479535 Methods for the synthesis of activated ethylfumarates and their use as intermediates Kelly Sullivan Kraft, Paul Serwinski, Vincent Pavia, Otto Phanstiel, Navneet Kaur 2022-10-25 $6,503,000
11440891 Formation of N-protected 3,6-bis-(4-aminoalkyl)-2,5,diketopiperazine Adrienne Stamper, Melissa Heitmann 2022-09-13 $15,789,000
11345668 Formation of N-protected 3,6-bis-(4-aminobutyl)-2,5-diketopiperazine through a cyclic α-N-protected amino ester Otto Phanstiel, William Elliot Bay, Kelly Sullivan Kraft 2022-05-31 $16,001,000
10870628 Formation of N-protected 3,6-bis-(4-aminobutyl)-2,5-diketopiperazine through a cyclic α-N-protected amino ester Otto Phanstiel, William Elliot Bay, Kelly Sullivan Kraft 2020-12-22 $14,260,000
10858325 Methods for the synthesis of activated ethylfumarates and their use as intermediates Kelly Sullivan Kraft, Paul Serwinski, Vincent Pavia, Otto Phanstiel, Navneet Kaur 2020-12-08 $5,489,000
10772883 Diketopiperazine microparticles with defined specific surface areas Marshall L. Grant, Grayson W. Stowell, Paul Menkin 2020-09-15 $3,486,000
10640471 Formation of N-protected 3,6-bis-(4-aminoalkyl)-2,5,diketopiperazine Adrienne Stamper, Melissa Heitmann 2020-05-05 $3,918,000
10577331 Formation of N-protected 3,6-bis-(4-aminobutyl)-2,5-diketopiperazine through a cyclic alpha-N-protected amino ester intermediate Otto Phanstiel, William Elliot Bay, Kelly Sullivan Kraft 2020-03-03 $3,682,000
10196366 Formation of N-protected 3,6-bis-(4-aminoalkyl)-2,5,diketopiperazine Adrienne Stamper, Melissa Heitmann 2019-02-05 $6,812,000
10071969 Methods for the synthesis of activated ethylfumarates and their use as intermediates Kelly Sullivan Kraft, Paul Serwinski, Vincent Pavia, Otto Phanstiel, Navneet Kaur 2018-09-11 $9,667,000
9944609 Formation of N-protected bis-3,6-(4-aminobutyl)-2, 5-diketopiperazine through a cyclic alpha-N-protected amino ester Otto Phanstiel, William Elliot Bay, Kelly Sullivan Kraft 2018-04-17 $3,697,000
9416113 Formation of N-protected bis-3,6-(4-aminoalkyl)-2,5,diketopiperazine Adrienne Stamper, Melissa Heitmann 2016-08-16 $12,413,000
9193691 Methods for the synthesis of activated ethylfumarates and their use as intermediates Kelly Sullivan Kraft, Paul Serwinski, Vinnie Pavia, Otto Phanstiel, Navneet Kaur 2015-11-24 $13,788,000
9187433 Formation of N-protected 3,6-bis-(4-aminobutyl) -2, 5-diketopiperazine through a cyclic α-N-protected active amino ester intermediate Otto Phanstiel, William Elliot Bay, Kelly Sullivan Kraft 2015-11-17 $14,748,000
8962836 Formation of N-protected bis-3,6-(4-aminobutyl)-2,5-diketopiperazine through a cyclic alpha-N-protected amino ester Otto Phanstiel, William Elliot Bay, Kelly Sullivan Kraft 2015-02-24 $60,229,000
8912328 Formation of N-protected bis-3,6-(4-aminoalkyl)-2,5,diketopiperazine Adrienne Stamper, Melissa Heitmann 2014-12-16 $23,563,000
8410309 Phenoxy carboxylic acid compounds and compositions for delivering active agents Andrea Leone-Bay, Kelly Sullivan Kraft, Destardi Moye-Sherman, David Gschneidner, Maria Aurora P. Boyd +4 more 2013-04-02
7951971 Phenoxy carboxylic acid compounds and compositions for delivering active agents Andrea Leone-Bay, Kelly Sullivan Kraft, Destardi Moye-Sherman, David Gscheidner, Maria Aurora P. Boyd +4 more 2011-05-31
7129274 Phenoxy carboxylic acid compounds and compositions for delivering active agents Andrea Leone-Bay, Kelly Sullivan Kraft, Destardi Moye-Sherman, David Gschneidner, Maria Aurora P. Boyd +4 more 2006-10-31 $2,788,000
6819517 Disc drive servo track writer gas leak detector and method Louis J. Fioravanti 2004-11-16 $13,969,000