Patent US3081273A successfully refreshed from Google Patents.
US3081273A
Expired / Lapsed
US
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Solution of terephthalamide polymer in solvent comprising antimony trichloride and process for preparing same
Assignee: Celanese Corp
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Filing: 1960-07-13
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Granted: 1963-03-12
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Expires: 1980-07-13
Abstract
No abstract record available.
Inventors
- 👤 Amerigo F Caprio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:34
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J2377/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
44 words
A COMPOSITION COMPRISING A HIGH MOLECULAR WEIGHT POLYTEREPHTHALAMIDE CONTAINING REPEATING STRUCTURAL UNITS OF THE FORMULA -NR-Y-NR-CO-P-C6H4-COWHERE R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND A MONOVALENT ORGANIC RADICAL AND Y IS A DIVALENT ORGANIC RADICAL, DISSOLVED IN A SOLVENT COMPRISING ANTIMONY TRICHLORIDE.
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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |