US2960493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber and film-forming polycondensates
Assignee: Gevaert Photo Producten NV
•
Filing: 1957-03-07
•
Granted: 1960-11-15
•
Expires: 1977-03-07
Abstract
No abstract record available.
Inventors
- 👤 Andre Jan Conix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:09
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
LINEAR FIBER-FORMING POLYMERIC AROMATIC ANHYDRIDES COMPOSED OF RECURRING STRUCTURAL UNITS OF THE FORMULA
Claim 2
Dependent Claim
13 words
LINEAR FIBER-FORMING POLYMERIC AROMATIC ANHYDRIDES COMPOSED OF RECURRING STRUCTURAL UNITS OF THE FORMULA
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) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |