US2685573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides from certain bis (1-aminoalkyl) aromatic hydrocarbons
Assignee: EIDP Inc
•
Filing: 1947-11-26
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Granted: 1954-08-03
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Expires: 1967-11-26
Abstract
No abstract record available.
Inventors
- 👤 Wittbecker Emerson La Verne
- 👤 Houtz Ray Clyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:17
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
A SYNTHETIC LINEAR POLYAMIDE HAVING A MAJOR PORTION OF THE AMIDO GROUPS IN RECURING BIVALENT GROUPS OF THE FORMULA:
References Cited (Backward Citations)
US2130523A
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US2130948A
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US2394092A
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US2244192A
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FR889332A
Cited
US2384700A
Cited
US2464693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |