Patent US3660341A successfully refreshed from Google Patents.
US3660341A
Expired / Lapsed
US
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Heat stable polyurethane solutions
Assignee: Goodrich Corp
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Filing: 1969-11-03
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Granted: 1972-05-02
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Expires: 1989-11-03
Abstract
Abstract SOLUTIONS OF POLYURETHANE ARE STABILIZED BY THE ADDITION OF AN ORGANIC HALOGEN-CONTAINING COMPOUND SUCH AS ETHYL IODIDE. THESE STABILIZED SOLUTIONS ARE PROTECTED AGAINST SEVERE DEGRADATION ON AGING, EVEN AT HIGH TEMPERATURES.
Inventors
- 👤 Kornelius Dinbergs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6511; C08K; C08K5/00; C08K5/02
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |