US3220844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic products
Assignee: Eastman Kodak Co
•
Filing: 1961-09-19
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Granted: 1965-11-30
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Expires: 1981-09-19
Abstract
No abstract record available.
Inventors
- 👤 Richard F Houck
- 👤 Donald A Smith
- 👤 Joseph S Yudelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:26
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/005; G03C1/04; G03C1/053; G03C1/81
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
A PHOTOGRAPHIC ELEMENT COMPOSED OF A PAPER SUPPORT CONTAINING THEREON A PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER AND BETWEEN THE EMULSION LAYER AND THE PAPER SUPPORT A LAYER OF A WATER-SOLUBLE SALT OF AN ALKYL ACRYLATE-ACRYLIC ACID COPOLYMER.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |