US2766221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic fiber-forming polymers from meta-xylylene diamine and adipic acid
Assignee: California Research LLC
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Filing: 1953-06-04
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Granted: 1956-10-09
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Expires: 1973-06-04
Abstract
No abstract record available.
Inventors
- 👤 Funston G Lum
- 👤 Earl F Carlston
- 👤 Judson C Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:26
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 0
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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) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |