Patent US2900443A successfully refreshed from Google Patents.
Patent US3168402A successfully refreshed from Google Patents.
US3168402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic stripping film
Assignee: 3M Co
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Filing: 1961-04-27
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Granted: 1965-02-02
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Expires: 1981-04-27
Abstract
No abstract record available.
Inventors
- 👤 Nick G Branibar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PHOTOGRAPHIC STRIPPING FILM COMRISING A TEMPROARY SUPPORT CONSISTING OF A TRANSLUCENT POLYSTYRENE PLASTIC FILM BASE MATERIAL INCORPORATING AN ANTI-HALATION PIGMENT, A RELEASE LAYER CONSISTING ESSENTIALLY OF CARBOXY METHYL CELLULOSE COATED ON THE TEMPORARY SUPPORT, A MEMBRANE CONSTITUTING A PERMANENT SUPPORT RELEASABLY SECURED TO THE TEMPORARY SUPPORT BY THE RELEASE LAYER AND PHOTO-SENSITIVE SILVER HALIDE EMULSION PERMANENTLY CARRIED BY THE MEMBRANE.
Claim 2
Dependent Claim
61 words
A PHOTOGRAPHIC STRIPPING FILM COMRISING A TEMPROARY SUPPORT CONSISTING OF A TRANSLUCENT POLYSTYRENE PLASTIC FILM BASE MATERIAL INCORPORATING AN ANTI-HALATION PIGMENT, A RELEASE LAYER CONSISTING ESSENTIALLY OF CARBOXY METHYL CELLULOSE COATED ON THE TEMPORARY SUPPORT, A MEMBRANE CONSTITUTING A PERMANENT SUPPORT RELEASABLY SECURED TO THE TEMPORARY SUPPORT BY THE RELEASE LAYER AND PHOTO-SENSITIVE SILVER HALIDE EMULSION PERMANENTLY CARRIED BY THE MEMBRANE.
References Cited (Backward Citations)
US1305195A
Cited
US2363764A
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US2650877A
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US2650878A
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US2887379A
Cited
US2963366A
Cited
US3010838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |