Patent US2759849A successfully refreshed from Google Patents.
US2759849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for treating photo copying paper
Assignee: Individual
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Filing: 1953-01-14
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Granted: 1956-08-21
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Expires: 1973-01-14
Abstract
No abstract record available.
Inventors
- 👤 Kafig Emanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:22
CPC Classifications
D; D21; D21H; D21H27/00; D21H21/00; D21H21/14; D21H21/26; D21H5/00; D21H5/0077; G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/785
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
A METHOD FOR RENDERING A SHEET OF PHOTOGRAPHIC PAPER TRANSPARENT WHICH COMPRISES HEATING A SOLUTION COMPRISED OF A MAJOR PROPORTION OF PARAFFIN AND A MINOR PROPORTION OF MINERAL OIL AND A WETTING AGENT TO ABOUT 80* TO 95* C., SAID WETTING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF A HIGH MOLECULAR WEIGHT SODIUM ALKYL SULFATE, SODIUM DICOTYLSULFOSUCCINATE, AND SODIUM GLYCERYL MONOLAURATE SULFATE, IMMERSING THE PAPER IN SAID HEATED SOLUTION, AND REMOVING ANY EXCESS SOLUTION FROM THE SURFACES OF SAID PAPER.
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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |