US2721801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of paper for photographic purposes
Assignee: Eastman Kodak Co
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Filing: 1951-01-25
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Granted: 1955-10-25
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Expires: 1971-01-25
Abstract
No abstract record available.
Inventors
- 👤 George R Clark
- 👤 William J Priest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:26
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/50; G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/79
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
A PHOTOGRAPHIC PAPER CONSISTING OF A PAPER BASE, A COATING APPLIED TO ONE SIDE THEREOF A BARIUM SULFATE IN A BINDER ESSENTIALLY CONSISTING OF APPROXIMATELY 75% OF STYRENE-BUTYL ACRYLATE POLYMER AND APPROXIMATELY 25% OF GELATIN AND THEREOVER A PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER.
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) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |