US3575939A
Expired / Lapsed
US
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Stiff,workable polyamides by blending with cyanuric acid
Assignee: Gulf Research and Development Co
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Filing: 1968-06-04
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Granted: 1971-04-20
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Expires: 1988-06-04
Abstract
Abstract SEVERAL POLYMERS OF NYLON HAVE LOWER MELT VISCOSITY AND HIGHER STIFFNESS VALUES WITH NO APPRECIABLE SACRIFICE IN OTHER PROPERTIES WHEN BLENDED WITH SMALL AMOUNTS OF CYANURIC ACID.
Inventors
- 👤 Rajindar K Kochhar
- 👤 Harry D Anspon
- 👤 Bert H Clampitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C08K5/3492; C08K5/34924
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |