US3674752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyamides from 1,6 or 2,6-naphthalene dicarboxylic acid
Assignee: Monsanto Co
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Filing: 1969-09-23
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Granted: 1972-07-04
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Expires: 1989-09-23
Abstract
Abstract Synthetic fibers prepared from copolymers of hexamethylene diamine-adipic acid and hexamethylene diamine- 1-6- or 2,6naphthalene dicarboxylic acid are produced which are particularly useful in providing textile and reinforcing fibers.
Inventors
- 👤 James S Ridgway
- 👤 Henry L King
- 👤 Oscar A Pickett Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:42
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
The copolyamide of claim 1 wherein (B) is
Claim 2
Dependent Claim
8 words
The copolyamide of claim 1 wherein (B) is
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |