US3769245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyurethane foam
Assignee: Goodrich Corp
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Filing: 1972-05-30
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Granted: 1973-10-30
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Expires: 1992-05-30
Abstract
Abstract ESSENTIALLY LINEAR POLYURETHANES ARE PREPARED BY THE REACTION OF STOICHIOMETRICALLY BALANCED AMOUNTS OF A LINEAR HYDROXYL TERMINATED INTERMEDIATE POLYMER RESIN, A GLYCOL CHAIN EXTENDER, AND AN ORGANIC DIISOCYANATE. WHEN A PORTION OF THE CHAIN EXTENDER GLYCOL IS REPLACED BY A CARBOXYL TERMINATED MATERIAL AND PROPER CATALYST IS ADDED, THERMOPLASTIC POLYURETHANE FOAM STRUCTURES ARE PRODUCED IN THE ABSENCE OF WATER.
Inventors
- 👤 F Stewart
- 👤 C Schollenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:44
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/28; C08G18/30; C08G18/34; C08G18/341; C08G18/65; C08G18/6505; C08G18/6511; C08G18/6541; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/0066; C08G2350/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |