Patent US2577165A successfully refreshed from Google Patents.
US2698241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements and process of preparing the same
Assignee: EIDP Inc
•
Filing: 1952-06-07
•
Granted: 1954-12-28
•
Expires: 1972-06-07
Abstract
No abstract record available.
Inventors
- 👤 Saner William Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/056; C08J2367/00; C08J2367/02; C08J2475/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PHOTOGRAPHIC ELEMENT COMPRISING A HYDROPHOBIC ORIENTABLE POLYESTER FILM BASE BEARING ON AT LEAST ONE SURFACE A SUBSTRATUM COMPOSED OF A MIXTURE OF 99 TO 50 PARTS BY WEIGHT OF A POLYESTER OF A GLYCOL AND TEREPHTHALIC ACID WHICH HAS A MOLECULAR WEIGHT IN EXCESS OF 5,000 AND IS SOLUBLE TO THE EXTENT OF AT LEAST 1/2% BY WEIGHT IN TRICHLORETHYLENE AND 1 TO 50 PARTS BY WEIGHT OF AN ORGANIC COMPOUND TAKEN FROM THE GROUP CONSISTING OF ORGANIC POLYISOCYANATES AND ORGANIC POLYISOTHIOCYANATES AND HAVING A WATER-PERMEABLE COLLID LAYER IN CONTACT WITH SAID SUBSTRATUM.
Claim 2
Dependent Claim
94 words
A PHOTOGRAPHIC ELEMENT COMPRISING A HYDROPHOBIC ORIENTABLE POLYESTER FILM BASE BEARING ON AT LEAST ONE SURFACE A SUBSTRATUM COMPOSED OF A MIXTURE OF 99 TO 50 PARTS BY WEIGHT OF A POLYESTER OF A GLYCOL AND TEREPHTHALIC ACID WHICH HAS A MOLECULAR WEIGHT IN EXCESS OF 5,000 AND IS SOLUBLE TO THE EXTENT OF AT LEAST 1/2% BY WEIGHT IN TRICHLORETHYLENE AND 1 TO 50 PARTS BY WEIGHT OF AN ORGANIC COMPOUND TAKEN FROM THE GROUP CONSISTING OF ORGANIC POLYISOCYANATES AND ORGANIC POLYISOTHIOCYANATES AND HAVING A WATER-PERMEABLE COLLID LAYER IN CONTACT WITH SAID SUBSTRATUM.
References Cited (Backward Citations)
US2216736A
Cited
US2282827A
Cited
US2333917A
Cited
US2430479A
Cited
US2627088A
Cited
US2625531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |