US3062649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic film with antistatic layer
Assignee: Eastman Kodak Co
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Filing: 1958-08-26
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Granted: 1962-11-06
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Expires: 1978-08-26
Abstract
No abstract record available.
Inventors
- 👤 Wilho M Salminen
- 👤 Walter J Weyerts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/89; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PHOTOGRAPHIC PRODUCT COMPRISING A SUPPORT CARRYING ON ONE SIDE A PHOTOGRAPHIC EMULSION LAYER AND ON THE OPPOSITE SIDE AN ANTI-STATIC LAYER CONSISTING OF CELLULOSE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF THE LOW VISCOSITY CARBOXYMETHYL CELLULOSES HAVING AN AVERAGE DEGREE OF SUBSTITUTION WITHIN THE RANGE OF APPROXIMATELY 231/2% TO APPROXIMATELY 40%, THE LOW VISCOSITY CARBOXYMETHYL HYDROXYETHYL CELLULOSES HAVING AN AVERAGE DEGREE OF SUBSTITUTION WITHIN THE RANGE OF APPROXIMATELY 231/3% TO APPROXIMATELY 331/3% AND MIXTURES THEREOF WITH UP TO 50% OF MATTING AGENT SELECTED FROM THE GROUP CONSISTING OF ZINC CARBONATE AND ALKALI SOLUBLE CELLULOSE ACETATE PHTHALATE, AND COATING AID SELECTED FROM THE GROUP CONSISTING OF SAPONIN AND THE SODIUM SALT OF THE CONDENSATION PRODUCT OF NAPHTHALENE SULFONIC ACID, AND FORMALDEHYDE.
Claim 2
Dependent Claim
121 words
A PHOTOGRAPHIC PRODUCT COMPRISING A SUPPORT CARRYING ON ONE SIDE A PHOTOGRAPHIC EMULSION LAYER AND ON THE OPPOSITE SIDE AN ANTI-STATIC LAYER CONSISTING OF CELLULOSE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF THE LOW VISCOSITY CARBOXYMETHYL CELLULOSES HAVING AN AVERAGE DEGREE OF SUBSTITUTION WITHIN THE RANGE OF APPROXIMATELY 231/2% TO APPROXIMATELY 40%, THE LOW VISCOSITY CARBOXYMETHYL HYDROXYETHYL CELLULOSES HAVING AN AVERAGE DEGREE OF SUBSTITUTION WITHIN THE RANGE OF APPROXIMATELY 231/3% TO APPROXIMATELY 331/3% AND MIXTURES THEREOF WITH UP TO 50% OF MATTING AGENT SELECTED FROM THE GROUP CONSISTING OF ZINC CARBONATE AND ALKALI SOLUBLE CELLULOSE ACETATE PHTHALATE, AND COATING AID SELECTED FROM THE GROUP CONSISTING OF SAPONIN AND THE SODIUM SALT OF THE CONDENSATION PRODUCT OF NAPHTHALENE SULFONIC ACID, AND FORMALDEHYDE.
References Cited (Backward Citations)
US2203768A
Cited
US2698798A
Cited
FR1061609A
Cited
US2725297A
Cited
US2717834A
Cited
US2823136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |