US3240756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous addition of phenolic chain terminator in bisphenol polycarbonate production by emulsion polymerization
Assignee: Honeywell International Inc
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Filing: 1961-03-02
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Granted: 1966-03-15
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Expires: 1981-03-02
Abstract
No abstract record available.
Inventors
- 👤 Rudolph D Deanin
- 👤 Township West Hartford
- 👤 Ann V Pinter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:15
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/20; C08G64/22; C08G64/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
IN A PROCESS FOR THE PRODUCITN OF A POLYCARBONATE OF A BISPHEOL BY INTRODUCING PHOSGENE INTO A MIXTURE OF (1) A MEMBER OF THE GROUP CONSISTING OF THE BISPHENOLS HAVING THE STRUCTURE
Claim 2
Dependent Claim
32 words
IN A PROCESS FOR THE PRODUCITN OF A POLYCARBONATE OF A BISPHEOL BY INTRODUCING PHOSGENE INTO A MIXTURE OF (1) A MEMBER OF THE GROUP CONSISTING OF THE BISPHENOLS HAVING THE STRUCTURE
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |