US3155635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for molecular weight control of polycarbonates
Assignee: Honeywell International Inc
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Filing: 1961-02-15
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Granted: 1964-11-03
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Expires: 1981-02-15
Abstract
No abstract record available.
Inventors
- 👤 Rudolph D Deanin
- 👤 Ann V Pinter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:18
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/20; C08G64/22; C08G64/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
IN A PROCESS FOR THE PRODUCTION OF A POLYCARBONATE OF A BISPHENOL WHICH IS A MEMBER OF THE GROUP CONSISTING OF BISPHENOLS HAVING THE STRUCTURE
Claim 2
Dependent Claim
25 words
IN A PROCESS FOR THE PRODUCTION OF A POLYCARBONATE OF A BISPHENOL WHICH IS A MEMBER OF THE GROUP CONSISTING OF 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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |