US3012992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane castings
Assignee: Bayer Corp
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Filing: 1959-03-25
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Granted: 1961-12-12
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Expires: 1979-03-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Pigott
- 👤 Bernard F Frye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:38
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/7671; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/4236; C08G18/4238; C08G2380/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR MAKING A POLYURETHANE ELASTOMER WHICH COMPRISES REACTING 100 PARTS OF AN HYDROXYL POLYESTER OBTAINED BY THE CONDENSATION OF A DIHYDRIC ALCOHOL WITH A DICARBOXYLIC ACID AND HAVING AN HYDROXYL NUMBER OF ABOUT 56, AN ACID NUMBER OF ABOUT 0.5 TO ABOUT 2.0, AND A MOLECULAR WEIGHT OF ABOUT 2000 WITH 42 TO 45 PARTS OF DIPHENYL METHANE DIISOCYANATE AND 18 TO 22 PARTS OF A PHENYLENE-DI-(B-OXYETHYLETHER), SAID PARTS BEING BY WEIGHT.
Claim 2
Dependent Claim
74 words
A PROCESS FOR MAKING A POLYURETHANE ELASTOMER WHICH COMPRISES REACTING 100 PARTS OF AN HYDROXYL POLYESTER OBTAINED BY THE CONDENSATION OF A DIHYDRIC ALCOHOL WITH A DICARBOXYLIC ACID AND HAVING AN HYDROXYL NUMBER OF ABOUT 56, AN ACID NUMBER OF ABOUT 0.5 TO ABOUT 2.0, AND A MOLECULAR WEIGHT OF ABOUT 2000 WITH 42 TO 45 PARTS OF DIPHENYL METHANE DIISOCYANATE AND 18 TO 22 PARTS OF A PHENYLENE-DI-(B-OXYETHYLETHER), SAID PARTS BEING BY WEIGHT.
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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |