Patent US2790736A successfully refreshed from Google Patents.
US2790736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making coated paper products and the products obtained
Assignee: Rohm and Haas Co
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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
- 👤 Walter W Toy
- 👤 Theodore E Bockstahler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:28
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
121 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 2.5% TO 7% BY WEIGHT IN THE COPOLYMER OF AT LEAST ONE ACID SELECTED FROM THE GROUP CONSISTING OF ITACONIC ACID, ACONITIC ACID, MALEIC ACID FUMARIC ACID, THE DIMER JOF, AND THE TRIMER OF, METHACRYLIC AICD, SAID COPOLYMER HAVING A TI VALUE NOT OVER 20*C.
Claim 2
Dependent Claim
121 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 2.5% TO 7% BY WEIGHT IN THE COPOLYMER OF AT LEAST ONE ACID SELECTED FROM THE GROUP CONSISTING OF ITACONIC ACID, ACONITIC ACID, MALEIC ACID FUMARIC ACID, THE DIMER JOF, AND THE TRIMER OF, METHACRYLIC AICD, 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 |