US2245129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing linear polyamides
Assignee: EIDP Inc
•
Filing: 1938-09-29
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Granted: 1941-06-10
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Expires: 1958-09-29
Abstract
No abstract record available.
Inventors
- 👤 Crawford H Greenewalt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:23
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/28; C08G69/04; C08G69/08; C08G69/14; C08G69/16; D; D01; D01F; D01F6/00; D01F6/58; D01F6/60
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) | 1944-06-09 | 1944-12-09 | 1945-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-09 | 1948-12-09 | 1949-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-09 | 1952-12-09 | 1953-06-10 | $7700.00 | Window Closed / Lapsed |