US2874046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the retreatment of foils consisting of highly polymeric substances for the application of hydrophilic colloids
Assignee: Agfa Gevaert NV
•
Filing: 1956-06-21
•
Granted: 1959-02-17
•
Expires: 1976-06-21
Abstract
No abstract record available.
Inventors
- 👤 Klockgether Helfried
- 👤 Muller Erwin
- 👤 Ossenbrunner Armin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:20
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676; C08G63/02; C08G63/12; C08G63/52; C08L; C08L67/00; C08L67/06; G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
A PHOTOGRAPHIC MATERIAL COMPRISING A HYDROPHOBIC FILM BASE AND A THIN LAYER COATED ON SAID FILM BASE SAID THIN LAYER COMPRISING A FILM FORMING AGENT CONSISTING ESSENTIALLY OF A POLYESTER OF AN ALPHA-BETA ETHYLENICALLY NSATURATED ALIPHATIC DICARBOXYLIC ACID AND GLYCOL SELECTED FROM THE GROUP CONSISTING OF THE COMPOUNDS HAVING THE FOLLOWING GENERAL FORMULAE:
Claim 2
Dependent Claim
53 words
A PHOTOGRAPHIC MATERIAL COMPRISING A HYDROPHOBIC FILM BASE AND A THIN LAYER COATED ON SAID FILM BASE SAID THIN LAYER COMPRISING A FILM FORMING AGENT CONSISTING ESSENTIALLY OF A POLYESTER OF AN ALPHA-BETA ETHYLENICALLY NSATURATED ALIPHATIC DICARBOXYLIC ACID AND GLYCOL SELECTED FROM THE GROUP CONSISTING OF THE COMPOUNDS HAVING THE FOLLOWING GENERAL FORMULAE:
Claim 3
Dependent Claim
17 words
THE PHOTOGRAPHIC MATERIAL OF CLAIM 1 WHEREIN A THIN GELATINE LAYER IS COATED ON SAID THIN LAYER.
Claim 4
Dependent Claim
22 words
THE PHOTOGRAPHIC MATERIAL OF CLAIM 2 WHEREIN A THIN NITROCELLULOSE LAYER IS PROVIDED BETWEEN SAID THIN GELATINE LAYER AND SAID THIN LAYER.
Claim 5
Dependent Claim
18 words
THE PHOTOGRAPHIC MATERIAL OF CLAIM 3 WHEREIN A SILVER HALIDE EMULISION LAYER IS COATED ON SAID GELATINE LAYER.
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |