US2698240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic films and their preparation
Assignee: EIDP Inc
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Filing: 1952-05-27
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Granted: 1954-12-28
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Expires: 1972-05-27
Abstract
No abstract record available.
Inventors
- 👤 Alles Francis Peter
- 👤 Saner William Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:41
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/914; C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/056; C08L; C08L67/00; G03C1/795; G03C1/7954; G03C7/00; G03C7/30; G03C7/32; G03C7/327; G03C7/3275; C08J2367/00; C08J2367/02; C08J2427/00; C08J2427/02; C08J2427/04; C08J2427/08; C08J2475/00; C08J2475/04; C08J2475/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE PROCESS WHICH COMPRISES COATING A WATERPERMEABLE HYDROXYL POLYMER LAYER ONTO A STRATUM COMPOSED OF A TRI-COMPONENT COPLOYMER MADE FROM 35 TO 96% OF VINYLIDENE CHLORIDE 3.5 TO 64.5% OF AN ETHYLENICALLY UNSATURATED ESTER AND 0.5 TO 25% OF ITACONIC ACID MONOMERS, ALL PERCENTAGES BEING BY WEIGHT, SAID ESTER BEING TAKEN FROM THE GROUP CONSISTING OF ALKYL ESTERS OF ACRYLIC AND METHACRYLIC ACIDS HAVING 1 TO 18 CARBON ATOMS IN THE ALKYL GROUP, ACRYONITRILE, METHACRYLONITRILE AND VINYL CHLORIDE: SAID STRATUM BEING ON A HYDROPHOBIC FILM BASE, AND HEATING THE COATED LAYER TO A TEMPERATURE FROM 70* C. TO 150* C.
Claim 2
Dependent Claim
100 words
THE PROCESS WHICH COMPRISES COATING A WATERPERMEABLE HYDROXYL POLYMER LAYER ONTO A STRATUM COMPOSED OF A TRI-COMPONENT COPLOYMER MADE FROM 35 TO 96% OF VINYLIDENE CHLORIDE 3.5 TO 64.5% OF AN ETHYLENICALLY UNSATURATED ESTER AND 0.5 TO 25% OF ITACONIC ACID MONOMERS, ALL PERCENTAGES BEING BY WEIGHT, SAID ESTER BEING TAKEN FROM THE GROUP CONSISTING OF ALKYL ESTERS OF ACRYLIC AND METHACRYLIC ACIDS HAVING 1 TO 18 CARBON ATOMS IN THE ALKYL GROUP, ACRYONITRILE, METHACRYLONITRILE AND VINYL CHLORIDE: SAID STRATUM BEING ON A HYDROPHOBIC FILM BASE, AND HEATING THE COATED LAYER TO A TEMPERATURE FROM 70* C. TO 150* C.
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) | 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 |