US3130175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane plastics
Assignee: Bayer AG
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Filing: 1960-07-13
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Granted: 1964-04-21
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Expires: 1980-07-13
Abstract
No abstract record available.
Inventors
- 👤 Peter Julius
- 👤 Schmidt Karl-Ludwig
- 👤 Bartl Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/86
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
IN A PROCESS FOR THE PREPARATION OF A POLYURETHANE PLASTIC WHICH COMPRISES VULCANIZING A POLYURETHANE PREPOLYMER, SAID PREPOLYMER OBTRAINED BY REACTING AN ORGANIC POLYISOCYANATE WITH A POLYMERIC ORGANIC COMPOUND CAPABLE OF REACTING WITH A POLYISOCYANATE TO FORM A POLYURETHANE, SAID ORGANIC COMPOUND HAVING ONLY TERMINAL ALCOHOLIC HYDROXYL GROUPS AS THE SOLE REACTIVE MOIETY, SAID ORGANIC COMPOUND HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUE 800, THE RESULTING PREPOLYMER COMPOSITION BEING SUBSTANTIALLY FREE FROM ETHYLENIC UNSATURATION, THE IMPROVEMENT WHICH COMPRISES REACTING WITH SAID PREPOLYMER ANORGANIC PEROXIDE AND TRIALLYL CYANURATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |