US3147688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product for protecting photographic sheet materials
Assignee: Polaroid Corp
•
Filing: 1961-03-10
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Granted: 1964-09-08
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
- 👤 William R Buckley
- 👤 Vaito K Eloranta
- 👤 Carl G Lindquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:13
CPC Classifications
G; G03; G03D; G03D15/00; G03D15/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROTECTIVE HOLDER FOR A PAIR OF PHOTOGRAPHIC SHEET MATERIALS WHICH HAVE BEEN TREATED WITH A FLUID PROCESSING COMPOSITION WHICH ADHERES TO A CENTRAL AREA OF ONE OF SAID SHEETS, SAID HOLDER COMPRISING, IN COMBINATION: (A) A SUBSTANTIALLY FLAT, RECTANGULAR FIRST SECTION HAVING A FIRST PLANAR SURFACE WITH AN EXTERNAL PERIPHERY COEXTENSIVE WITH THAT OF SAID FIRST SECTION; (B) A SUBSTANTIALLY FLAT, RECTANGULAR SECOND SECTION HAVING A SECOND PLANAR SURFACE AND HINGEDLY CONNECTED TO SAID FIRST SECTION AND MOVABLE BETWEEN OPEN AND CLOSED POSITIONS WITH RESPECT THERETO; (C) MEANS FOR RELEASABLY SECURING SAID FIRST AND SECOND SECTIONS IN SAID CLOSED POSITION WITH SAID FIRST AND SECOND SURFACE IN SUBSTANTIALLY CONTINUOUS CONTACT;
Claim 2
Dependent Claim
111 words
A PROTECTIVE HOLDER FOR A PAIR OF PHOTOGRAPHIC SHEET MATERIALS WHICH HAVE BEEN TREATED WITH A FLUID PROCESSING COMPOSITION WHICH ADHERES TO A CENTRAL AREA OF ONE OF SAID SHEETS, SAID HOLDER COMPRISING, IN COMBINATION: (A) A SUBSTANTIALLY FLAT, RECTANGULAR FIRST SECTION HAVING A FIRST PLANAR SURFACE WITH AN EXTERNAL PERIPHERY COEXTENSIVE WITH THAT OF SAID FIRST SECTION; (B) A SUBSTANTIALLY FLAT, RECTANGULAR SECOND SECTION HAVING A SECOND PLANAR SURFACE AND HINGEDLY CONNECTED TO SAID FIRST SECTION AND MOVABLE BETWEEN OPEN AND CLOSED POSITIONS WITH RESPECT THERETO; (C) MEANS FOR RELEASABLY SECURING SAID FIRST AND SECOND SECTIONS IN SAID CLOSED POSITION WITH SAID FIRST AND SECOND SURFACE IN SUBSTANTIALLY CONTINUOUS CONTACT;
References Cited (Backward Citations)
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Cited
US1441091A
Cited
US1482626A
Cited
US1698320A
Cited
GB637147A
Cited
US2591055A
Cited
US2768564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |