US3269860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of paper with latex composition
Assignee: WR Grace and Co
•
Filing: 1963-04-03
•
Granted: 1966-08-30
•
Expires: 1983-04-03
Abstract
No abstract record available.
Inventors
- 👤 Spencer M Richardson
- 👤 Richard C Hoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:26
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08G18/70; C08G18/72; C08G18/80; C08K; C08K5/00; C08K5/16; D21H17/03; D21H17/05; D21H17/07; D21H17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR IMPROVIDING THE PHYSICAL PROPERTIES OF POROUS CELLULOSIC PAPER WHEN THE PAPER IS IMPREGNATED THEREWITH WHICH COMPRISES IMPREGNATING THE PAPER WITH A COMPOSITION CINSISTING ESSENTIALLY OF A RUBBER LATEX AND A THERMALLY DECOMPOSABLE ADDUCT OF AN ISOCYANATE, AND ADDUCT BEING PRESENT AT A LEVEL OF ABOUT 0.05 TO 10 PARTS BY WEIGHT PER 99.45 TO 98.5 PARTS BY WEIGHT OF SAID RUBBER LATEX, SOLIDS BASIS, SUBSTANTIALLY DRYING THE PAPER AT TEMPERATUURES BELOW THE DECOMPOSITION TEMPERATURE OF SAID FADDUCT, AND HEATING THE PAPER TO AT LEAST THE DECOMPOSITION TEMPERATURE OF SAID DUCT.
Claim 2
Independent Claim
93 words
A METHOD FOR IMPROVIDING THE PHYSICAL PROPERTIES OF POROUS CELLULOSIC PAPER WHEN THE PAPER IS IMPREGNATED THEREWITH WHICH COMPRISES IMPREGNATING THE PAPER WITH A COMPOSITION CINSISTING ESSENTIALLY OF A RUBBER LATEX AND A THERMALLY DECOMPOSABLE ADDUCT OF AN ISOCYANATE, AND ADDUCT BEING PRESENT AT A LEVEL OF ABOUT 0.05 TO 10 PARTS BY WEIGHT PER 99.45 TO 98.5 PARTS BY WEIGHT OF SAID RUBBER LATEX, SOLIDS BASIS, SUBSTANTIALLY DRYING THE PAPER AT TEMPERATUURES BELOW THE DECOMPOSITION TEMPERATURE OF SAID FADDUCT, AND HEATING THE PAPER TO AT LEAST THE DECOMPOSITION TEMPERATURE OF SAID DUCT.
References Cited (Backward Citations)
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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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |