Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5045252 | Method and apparatus for controlling rotary extruder | Allen C. Bailey, Richard D. Antrim | 1991-09-03 |
| 5033861 | Rotary extruder with internally heated rotor | Sammy Kent Flud | 1991-07-23 |
| 4990233 | Method for retarding mineral buildup in downhole pumps | — | 1991-02-05 |
| 4974336 | Drying method | — | 1990-12-04 |
| 4887907 | Rotary extruder with internally cooled rotor | Sammy Kent Flud | 1989-12-19 |
| 4879138 | Composition for plastic article with unitarily molded foam layer | Marion Johnson, Ramiro V. Ramoos | 1989-11-07 |
| 4872573 | Plastic closure with barrier coating | Marion Johnson | 1989-10-10 |
| 4866100 | Composition for plastic article with unitarily molded foam layer | Marion Johnson, Ramiro V. Ramos | 1989-09-12 |
| 4839969 | Drying method and apparatus | — | 1989-06-20 |
| 4813863 | Rotary extruder with a gear pump | Raleigh N. Rutledge, Durward E. Rutledge | 1989-03-21 |
| 4744478 | Plastic closure with unitarily molded, foamed sealing layer | — | 1988-05-17 |
| 4713271 | Foamed polymer tubing | Alonzo H. Searl, Raleigh N. Rutledge | 1987-12-15 |
| 4621678 | Heat exchanger apparatus for extruding thermoplastic compositions | Raleigh N. Rutledge, Alonzo H. Searl, Walter E. Sommerman | 1986-11-11 |
| 4611987 | Apparatus for forming multilayer thermoplastic resin extrusions | Raleigh N. Rutledge, Marion Johnson, Jackie D. Murley, Carl Blanchard | 1986-09-16 |
| 4552791 | Plastic container with decreased gas permeability | — | 1985-11-12 |
| 4548570 | Extrusion apparatus for producing thermoplastic pipe | Raleigh N. Rutledge | 1985-10-22 |
| 4526736 | Process and apparatus for manufacturing flexible foamed articles | Alonzo H. Searl, Raleigh N. Rutledge | 1985-07-02 |
| 4512395 | Multiple heat exchanger distribution apparatus | Raleigh N. Rutledge | 1985-04-23 |
| 4512943 | Extrusion process for producing thermoplastic pipe | Raleigh N. Rutledge | 1985-04-23 |
| 4507071 | Coextrusion apparatus for producing multiple layered thermoplastic pipe | Raleigh N. Rutledge, Jackie D. Murley | 1985-03-26 |
| 4501543 | Rotary extruder | Raleigh N. Rutledge | 1985-02-26 |
| 4499041 | Coextrusion process for producing multiple layered thermoplastic pipe | Raleigh N. Rutledge, Jackie D. Murley | 1985-02-12 |
| 4496408 | Method for producing biaxially oriented hollow articles | — | 1985-01-29 |
| 4483669 | Multiple-layered sheeting apparatus | Raleigh N. Rutledge, Jackie D. Murley | 1984-11-20 |
| 4483812 | Valve plate and feedblock design for co-extrusion apparatus and co-extrusion process using same | Raleigh N. Rutledge, Jackie D. Murley | 1984-11-20 |