US2999846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High molecular weight thermoplastic aromatic sulfoxy polycarbonates
Assignee: Individual
•
Filing: 1957-11-27
•
Granted: 1961-09-12
•
Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 Schnell Hermann
- 👤 Krimm Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:55
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G64/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A FILM-FORMING HIGH MOLECULAR WEIGHT RESINOUS THERMOPLASTIC LINEAR POLYCARBONATE OF A DIHYDROXY COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
16 words
A FILM-FORMING HIGH MOLECULAR WEIGHT RESINOUS THERMOPLASTIC LINEAR POLYCARBONATE OF A DIHYDROXY COMPOUND HAVING 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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |