US3711441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal oxidatively stable polycarbonate composition
Assignee: General Electric Co
•
Filing: 1972-01-03
•
Granted: 1973-01-16
•
Expires: 1992-01-03
Abstract
Abstract A THERMAL OXIDATIVELY STABLE POLYCARBONATE COMPOSITION CONSISTING OF THE REACTION PRODUCT OF BIPHENOL-A, A CARBONATE PRECURSOR AND A MINOR AMOUNT OF A MONOCHLOROPHOSPHINE AND TO A PROCESS FOR PREPARING THE STABLE POLYMER COMPOSITION WHICH CONSISTS OF ADDING 0.0005 TO ABOUT 0.1 MOLE OF A MONOCHLOROPHOSPHINE PER MOLE OF BISPHENOL-A TO THE REACTION MEDIUM.
Inventors
- 👤 F Liberti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:34
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/20; C08G64/22; C08G64/24; C08G64/04; C08G64/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |