Patent US3138562A successfully refreshed from Google Patents.
US3138562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular polyurethane plastics
Assignee: Bayer AG
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Filing: 1960-05-20
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Granted: 1964-06-23
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Expires: 1980-05-20
Abstract
No abstract record available.
Inventors
- 👤 Nischk Gunther
- 👤 Braun Gunther
- 👤 Hoppe Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/60; C08G18/606; C08G18/42; C08G18/4244; C08G18/4247; C08G18/4252; C08G18/4288; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/005; C08G2110/0083; C08G2350/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A CELLULAR POLYURETHANE PLASTIC OBTAINED BY A PROCESS WHICH COMPRISES REACTING, IN THE PRESENCE OF A BLOWING AGENT, AN ORGANIC POLYISOYANATE WITH A POLYESTER OBTAINED BY A PROCESS WHICH COMPRISES REACTING A MONOMERIC POLYHYDRIC ALCOHOL, A POLYCARBOXYLIC ACID, A MONOMERIC UNSATURATED LONG CHAIN FATTY ACID AND A POLYHYDRIC POLYALKYLENE ETHER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 400 , AT LEAST ABOUT 50 PERCENT OF THE ALLKYLENE RADICALS OF SAID POLYHYDRIC POLYALKYLENE ETHER CONTAINING AT LEAST THREE CARBON ATOMS.
Claim 2
Dependent Claim
80 words
A CELLULAR POLYURETHANE PLASTIC OBTAINED BY A PROCESS WHICH COMPRISES REACTING, IN THE PRESENCE OF A BLOWING AGENT, AN ORGANIC POLYISOYANATE WITH A POLYESTER OBTAINED BY A PROCESS WHICH COMPRISES REACTING A MONOMERIC POLYHYDRIC ALCOHOL, A POLYCARBOXYLIC ACID, A MONOMERIC UNSATURATED LONG CHAIN FATTY ACID AND A POLYHYDRIC POLYALKYLENE ETHER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 400 , AT LEAST ABOUT 50 PERCENT OF THE ALLKYLENE RADICALS OF SAID POLYHYDRIC POLYALKYLENE ETHER CONTAINING AT LEAST THREE CARBON ATOMS.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |