US3164651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting of polycarbonate dopes which contain a small amount of an alcohol
Assignee: GAF Chemicals Corp
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Filing: 1960-11-16
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Granted: 1965-01-05
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Expires: 1980-11-16
Abstract
No abstract record available.
Inventors
- 👤 Chu James Chen-Fan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:05
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/02; B03B5/10; B03B5/24; C; C08; C08K; C08K5/00; C08K5/04; C08K5/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE PROCESS OF CASTING POLYCARBONATE FILM WHILE AVOIDING THE OCCURENCE OF SNAP BARS, WHICH COMPRISES CASTING ON A HYDROLYZED HYDROACETATE SURFACE A STABLE CASTING DOPE CONSISTING OF POLYCARBONATE RESIN, AN ORGANIC SOLVENT THEREFOR AND FROM ABOUT .02 TO 1% BY WEIGHT OF SAID CASTING DOPE OF A SMALL AMOUNT WITH RESPECT TO SAID ORGANIC SOLVENT OF AN ALCOHOL SELECTED FROM THE CLASS CONSISTING OF LAURYL ALCOHOL, MYRISTYL ALCOHOL, BENZYL ALCOHOL AND MIXTURES OF LAURYL ALCOHOL AND MYRISTYL ALCOHOL, DRYING TO REMOVE THE SOLVENT AND STRIPPING THE FILM FROM THE CAST SURFACE.
Claim 2
Dependent Claim
91 words
THE PROCESS OF CASTING POLYCARBONATE FILM WHILE AVOIDING THE OCCURENCE OF SNAP BARS, WHICH COMPRISES CASTING ON A HYDROLYZED HYDROACETATE SURFACE A STABLE CASTING DOPE CONSISTING OF POLYCARBONATE RESIN, AN ORGANIC SOLVENT THEREFOR AND FROM ABOUT .02 TO 1% BY WEIGHT OF SAID CASTING DOPE OF A SMALL AMOUNT WITH RESPECT TO SAID ORGANIC SOLVENT OF AN ALCOHOL SELECTED FROM THE CLASS CONSISTING OF LAURYL ALCOHOL, MYRISTYL ALCOHOL, BENZYL ALCOHOL AND MIXTURES OF LAURYL ALCOHOL AND MYRISTYL ALCOHOL, DRYING TO REMOVE THE SOLVENT AND STRIPPING THE FILM FROM THE CAST SURFACE.
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) | 1968-01-05 | 1968-07-06 | 1969-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-05 | 1972-07-06 | 1973-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-05 | 1976-07-06 | 1977-01-05 | $7700.00 | Window Closed / Lapsed |