US2790735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated paper products and methods of making them
Assignee: Rohm and Haas Co
•
Filing: 1955-01-31
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Granted: 1957-04-30
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Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Paul J Mclaughlin
- 👤 Benjamin B Kine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A MINERAL COATED PAPER PRODUCT COMPRISING A PAPER SHEET CARRYING ON A SURFACE THEREOF A COATING COMPRISING (1) A FINELY DIVIDED PIGMENTARY MATERIAL HAVING A PREDOMINANT PROPORTION OF CLAY THEREIN AND (2) A BINDER COMPRISING FOR EACH 100 PARTS BY WEIGHT OF THE PIGMENT, FROM 8 TO 25 PARTS BY WEIGHT OF A SALT OF A COPOLYMER OF AT LEAST ONE LOWER ALKYL ACRYLATE IN WHICH THE ALKYL GROUP HAS FROM 1 TO 4 CARBON ATOMS WITH 4% TO 7% BY WEIGHT IN THE COPOLYMER OF AT LEAST ONE ACID, SELECTED FROM ACRYLIC ACID AND METHACRYLIC ACID, SAID COPOLYMER HAVING A TI VALUE NOT OVER 20*C.
Claim 2
Dependent Claim
106 words
A MINERAL COATED PAPER PRODUCT COMPRISING A PAPER SHEET CARRYING ON A SURFACE THEREOF A COATING COMPRISING (1) A FINELY DIVIDED PIGMENTARY MATERIAL HAVING A PREDOMINANT PROPORTION OF CLAY THEREIN AND (2) A BINDER COMPRISING FOR EACH 100 PARTS BY WEIGHT OF THE PIGMENT, FROM 8 TO 25 PARTS BY WEIGHT OF A SALT OF A COPOLYMER OF AT LEAST ONE LOWER ALKYL ACRYLATE IN WHICH THE ALKYL GROUP HAS FROM 1 TO 4 CARBON ATOMS WITH 4% TO 7% BY WEIGHT IN THE COPOLYMER OF AT LEAST ONE ACID, SELECTED FROM ACRYLIC ACID AND METHACRYLIC ACID, SAID COPOLYMER HAVING A TI VALUE NOT OVER 20*C.
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) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |