Patent US2973263A successfully refreshed from Google Patents.
US2973263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic backing layers for photographic film
Assignee: GAF Chemicals Corp
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Filing: 1957-04-19
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Granted: 1961-02-28
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Expires: 1977-04-19
Abstract
No abstract record available.
Inventors
- 👤 Frank J Kaszuba
- 👤 June M Matteson
- 👤 Russell P Easton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/89
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A LIGHT SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A CELLULOSE ESTER FILM SUPPORT CARRYING A SILVER HALIDE EMULSION LAYER, SAID ELEMENT HAVING AN ANTISTATIC BACKING LAYER COMPRISING A WAX HAVING A MELTING POINT HIGHER THAN 43* C. AND A PARTICLE SIZE RANGING FROM 0.1 TO 5 MICRONS UNIFORMLY DISPERSED IN AN ALKALI METAL SALT OF A TERPOLYMER OBTAINED BY THE COPOLYMERIZATION OF ONE MOLAR EQUIVALENT OF A LOWER ALIPHATIC VINYL ESTER SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, VINYL PROPIONATE AND VINYL BUTYRATE, TWO MOLAR EQUIVALENTS OF ACRYLIC ACID AND ONE MOLAR EQUIVALENT OF STYRENE, THE AMOUNT OF WAX BASED ON THE AMOUNT OF TRIPLE POLYMER BEING ON THE ORDER OF FROM 1 TO 10 PERCENT BY WEIGHT.
Claim 2
Dependent Claim
117 words
A LIGHT SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A CELLULOSE ESTER FILM SUPPORT CARRYING A SILVER HALIDE EMULSION LAYER, SAID ELEMENT HAVING AN ANTISTATIC BACKING LAYER COMPRISING A WAX HAVING A MELTING POINT HIGHER THAN 43* C. AND A PARTICLE SIZE RANGING FROM 0.1 TO 5 MICRONS UNIFORMLY DISPERSED IN AN ALKALI METAL SALT OF A TERPOLYMER OBTAINED BY THE COPOLYMERIZATION OF ONE MOLAR EQUIVALENT OF A LOWER ALIPHATIC VINYL ESTER SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, VINYL PROPIONATE AND VINYL BUTYRATE, TWO MOLAR EQUIVALENTS OF ACRYLIC ACID AND ONE MOLAR EQUIVALENT OF STYRENE, THE AMOUNT OF WAX BASED ON THE AMOUNT OF TRIPLE POLYMER BEING ON THE ORDER OF FROM 1 TO 10 PERCENT BY WEIGHT.
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) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |