Patent US3214489A successfully refreshed from Google Patents.
US3214489A
Expired / Lapsed
US
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Polycarbonate plasticized polyurethanes
Assignee: Goodrich Corp
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Filing: 1961-09-22
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Granted: 1965-10-26
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Expires: 1981-09-22
Abstract
No abstract record available.
Inventors
- 👤 John C Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:54
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A COMPOSITION OF MATTER COMPRISING THE REACTION PRODUCT OF AN AROMATIC POLYCARBONATE HAVING A MOLECULAR WEIGHT OF 300-1500 AND HYDROXYL GROUP TERMINATION, AN AROMATIC DIISOCYANATE, AND A LOW-MOLECULAR WEIGHT, LINEAR HYDROXYL TERMINATED ALIPHATIC POLYESTER, SAID POLYESTER HAVING A MOLECULAR WEIGHT OF 60-1200 AND AN ACID NUMBER LESS THAN 10 AND BEING A CONDENSATION REACTION PRODUCT OF A DICARBOXYLIC ACID WITH A GLYCOL.
Claim 2
Dependent Claim
62 words
A COMPOSITION OF MATTER COMPRISING THE REACTION PRODUCT OF AN AROMATIC POLYCARBONATE HAVING A MOLECULAR WEIGHT OF 300-1500 AND HYDROXYL GROUP TERMINATION, AN AROMATIC DIISOCYANATE, AND A LOW-MOLECULAR WEIGHT, LINEAR HYDROXYL TERMINATED ALIPHATIC POLYESTER, SAID POLYESTER HAVING A MOLECULAR WEIGHT OF 60-1200 AND AN ACID NUMBER LESS THAN 10 AND BEING A CONDENSATION REACTION PRODUCT OF A DICARBOXYLIC ACID WITH A GLYCOL.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |