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US3475387A
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US
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Manufacture of polyamides from aromatic dicarboxylic acids
Assignee: British Nylon Spinners Ltd
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Filing: 1967-12-08
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Granted: 1969-10-28
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Expires: 1987-12-08
Abstract
No abstract record available.
Inventors
- 👤 John Anthony Carter
- 👤 Geoffrey James Tyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:21
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB610264A
Cited
GB627733A
Cited
US2831834A
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US2752328A
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US2742496A
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GB797617A
Cited
GB825096A
Cited
GB861866A
Cited
US3164630A
Cited
US3206438A
Cited
US3193535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |