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Patent US3437486A successfully refreshed from Google Patents.
US3437486A
Expired / Lapsed
US
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Monobasically sulfated vinyl copolymers as silver halide stabilizers
Assignee: Eastman Kodak Co
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Filing: 1966-04-04
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Granted: 1969-04-08
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Expires: 1986-04-04
Abstract
No abstract record available.
Inventors
- 👤 James R King Jr
- 👤 Thomas E Whiteley
- 👤 Louis M Minsk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PHOTOGRAPHIC SILVER HALIDE ENULSION CONTAINING AN AMOUNT EFFECTIVE TO REDUCE SPONTANEOUS FOG OF A SALT OF A MONOBASICALLY SULFATED VINYL COPOLYLMER AT LEAST 5 MOLE PERCENT OF THE MONOMER UNITS THEREOF BEING MONOMERS COMPRISING A SULFATE MOIETY, THE CATIONS OF SAID SALT BEING MEMBERS SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL IONS.
Claim 2
Dependent Claim
56 words
A PHOTOGRAPHIC SILVER HALIDE ENULSION CONTAINING AN AMOUNT EFFECTIVE TO REDUCE SPONTANEOUS FOG OF A SALT OF A MONOBASICALLY SULFATED VINYL COPOLYLMER AT LEAST 5 MOLE PERCENT OF THE MONOMER UNITS THEREOF BEING MONOMERS COMPRISING A SULFATE MOIETY, THE CATIONS OF SAID SALT BEING MEMBERS SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL IONS.
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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |