Patent US3218183A successfully refreshed from Google Patents.
US3218183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating of printed paper with polyvinyl alcohol coating compositions
Assignee: Cumberland Chemical Corp
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Filing: 1961-06-02
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Granted: 1965-11-16
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Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
- 👤 Fritzsching Peter Rudolph
- 👤 Robert C Gilardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:00
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A METHOD OF COATING A PRINTED PAPER SHEET HAVING A DRY PRINTED SURFACE WHICH COMPRISES APPLYING AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER AND FROM ABOUT 5 PERCENT TO 30 PERCENT BY WEIGHT OF POLYVINYL ALCOHOL HAVING A DEGREE OF HYDROLYSIS RANGING FROM 96 PERCENT TO 100 PERCENT AND A VISCOSITY IN 4 PER CENT AQUEOUS SOLUTION AT 20*C. RANGING FROM ABOUT 2 TO 150 CENTIPOISES TO SAID DRY PRINTED SURFACE OF SAID PAPER SHEET, SAID SOLUTION BEING APPLIED IN A QUANTITY TO PROVIDED ABOUT 0.6 POUND TO ABOUT 4 POUNDS OF POLYVINYL ALCOHOL PER 1,000 SQUARE FEET OF SAID PAPER SHEET, AND DRYING THE PAPER SHEET AT A SHEET TEMPERATURE OF ABOUT 160* TO 195*F. TO A MOISTURE CONTENT OF AT MOST 4 PERCENT, TO PRODUCE A THIN, WATER-RESISTANT, TRANSPARENT FILM OF POLYVINYL ALCOHOL SUPERIMPOSED ON SAID PRINTED SURFACE OF SAID SHEET.
Claim 2
Independent Claim
143 words
A METHOD OF COATING A PRINTED PAPER SHEET HAVING A DRY PRINTED SURFACE WHICH COMPRISES APPLYING AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER AND FROM ABOUT 5 PERCENT TO 30 PERCENT BY WEIGHT OF POLYVINYL ALCOHOL HAVING A DEGREE OF HYDROLYSIS RANGING FROM 96 PERCENT TO 100 PERCENT AND A VISCOSITY IN 4 PER CENT AQUEOUS SOLUTION AT 20*C. RANGING FROM ABOUT 2 TO 150 CENTIPOISES TO SAID DRY PRINTED SURFACE OF SAID PAPER SHEET, SAID SOLUTION BEING APPLIED IN A QUANTITY TO PROVIDED ABOUT 0.6 POUND TO ABOUT 4 POUNDS OF POLYVINYL ALCOHOL PER 1,000 SQUARE FEET OF SAID PAPER SHEET, AND DRYING THE PAPER SHEET AT A SHEET TEMPERATURE OF ABOUT 160* TO 195*F. TO A MOISTURE CONTENT OF AT MOST 4 PERCENT, TO PRODUCE A THIN, WATER-RESISTANT, TRANSPARENT FILM OF POLYVINYL ALCOHOL SUPERIMPOSED ON SAID PRINTED SURFACE OF SAID SHEET.
References Cited (Backward Citations)
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US2597863A
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |