US3078178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of hydrolizing and polishing surface of cellulose ester substrate and photographic product produced therefrom
Assignee: Polaroid Corp
•
Filing: 1960-03-02
•
Granted: 1963-02-19
•
Expires: 1980-03-02
Abstract
No abstract record available.
Inventors
- 👤 Bertil E Ostberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:28
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; C08J2301/00; C08J2301/08; C08J2301/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PHOTOGRAPHIC PRODUCT USEFUL FUR CARRYING PHOTOGRAPHIC IMAGES COMPRISING A CELLULOSE ESTER BASE HAVING A THIN, SMOOTH, HARD, HIGH-GLOSS SURFACE PORTION PRODUDED BY APPLYING TO THE SURFACE OF SAID CELLULOSE ESTER BASE A QUANTITY OF A LIQUID COMPRISING A SOFTENING AGENT AND A HYDROLYZING AGENT FOR SAID CELLULOSE ESTER SO AS TO SOFTEN AND HYDROLYZE BUT A THIN SURFACE PORTION OF SAID CELLULOSE ESTER BASE, AND IMMEDIATELY THEREAFTER CONTACTING SAID SOFTENED SURFACE WITH A HEATED SMOOTH-SURFACED POLISHING ELEMENT FOR A RELATIVELY SHORT PERIOD OF TIME TO POLISH AND HARDEN THE RESULTANT THIN SURFACE.
Claim 2
Dependent Claim
93 words
A PHOTOGRAPHIC PRODUCT USEFUL FUR CARRYING PHOTOGRAPHIC IMAGES COMPRISING A CELLULOSE ESTER BASE HAVING A THIN, SMOOTH, HARD, HIGH-GLOSS SURFACE PORTION PRODUDED BY APPLYING TO THE SURFACE OF SAID CELLULOSE ESTER BASE A QUANTITY OF A LIQUID COMPRISING A SOFTENING AGENT AND A HYDROLYZING AGENT FOR SAID CELLULOSE ESTER SO AS TO SOFTEN AND HYDROLYZE BUT A THIN SURFACE PORTION OF SAID CELLULOSE ESTER BASE, AND IMMEDIATELY THEREAFTER CONTACTING SAID SOFTENED SURFACE WITH A HEATED SMOOTH-SURFACED POLISHING ELEMENT FOR A RELATIVELY SHORT PERIOD OF TIME TO POLISH AND HARDEN THE RESULTANT THIN SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |