Patent US3015537A successfully refreshed from Google Patents.
US3015537A
Expired / Lapsed
US
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Paper having improved characteristics and its preparation
Assignee: Eastman Kodak Co
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Filing: 1956-04-26
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Granted: 1962-01-02
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Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 Glen G Gray
- 👤 Joseph T Leone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:52
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A METHOD OF PREPARING PAPER HAVING SUBSTANTIALLY PERMANENT SURFACE CHARACTERISTICS AND GOOD RESISTANCE TO THE EFFECTS OF MOISTURE WHICH COMPRISES THE STEPS OF PARTIALLY ACYLATING THE CELLULOSE OF THE PAPER SO AS TO IMPART THERETO A 10-30% CONTENT OF LOWER FATTY ACID RADICALS CHEMICALLY COMBINED THEREWITH AND SUBJECTING THE PAPER IN A CONDITION WET WITH A WATER-MISCIBLE LIQUID IN THE AMOUNT OF AT LEAST 12% SIMULTANEOUSLY TO HEAT AND PRESSING BETWEEN TWO SOLID SURFACE AT LEAST ONE OF WHICH IS A POLISHED METAL SURFACE AT 300 TO 1,000 P.S.I. AND A NON-DETERIORATING TEMPERATURE OF AT LEAST 200*F. TO REDUCE THE LIQUID CONTENT OF THE PAPER TO A VALUE NOT MORE THAN 5%.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |