Patent US3047435A successfully refreshed from Google Patents.
US3047435A
Expired / Lapsed
US
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Recovery of polyester film base from terpolymer-subbed photographic film scrap
Assignee: Eastman Kodak Co
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Filing: 1958-11-10
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Granted: 1962-07-31
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Expires: 1978-11-10
Abstract
No abstract record available.
Inventors
- 👤 Richard E Wemple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:37
CPC Classifications
G; G03; G03C; G03C11/00; G03C11/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR RECOVERING FILM BASE FROM PHOTOGRAPHIC FILM SCRAP HAVING A HIGHLY POLYMERIC LINEAR POLYESTER OF A BIFUNCTIONAL AROMATIC CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF TEREPHTHALIC ACID 4,4''-SULFONYLDIBENZONIC ACID AND TRANS-1,4-CYCLOHEXANEDICARBOXYLIC ACID AND A DIHYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF A GLYCOL HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
51 words
A PROCESS FOR RECOVERING FILM BASE FROM PHOTOGRAPHIC FILM SCRAP HAVING A HIGHLY POLYMERIC LINEAR POLYESTER OF A BIFUNCTIONAL AROMATIC CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF TEREPHTHALIC ACID 4,4''-SULFONYLDIBENZONIC ACID AND TRANS-1,4-CYCLOHEXANEDICARBOXYLIC ACID AND A DIHYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF A GLYCOL HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2627088A
Cited
US2850411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |