Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Polyurethane foam cleaning pads and a process for their manufacture

Polyurethane foam cleaning pads and a process for their manufacture

US Patent 4421526 · Granted Dec 20, 1983

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Disposable contraceptive cervical barrier1986
Skateboard1982
Polyurethane sponges manufactured with additive dispersed therein1982
Polyurethane sponges manufactured with additive dispersed therein1982
Method of manufacturing a disposable contraceptive intravaginal cervical barrier1982
Method of manufacturing a disposable contraceptive intravaginal cervical barrier1982
Polyurethane sponges manufactured with additive dispersed therein1981
Polyurethane sponges manufactured with additive dispersed therein1981
Vaginal syringe1980
Vaginal syringe1980
Disposable contraceptive cervical barrier1980
Disposable contraceptive cervical barrier1980