US2874066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated paper products and methods for making them
Assignee: Rohm and Haas Co
•
Filing: 1955-10-17
•
Granted: 1959-02-17
•
Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Paul J Mclaughlin
- 👤 Walter W Toy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:29
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
97 words
A METHOD OF PRODUCING MINERAL-COATED PAPER WHICH COMPRISES COATING AT LEAST ONE SIDE OF A PAPER SHEET WITH AN AQUEOUS DISPERSION OF 40% TO 70% TOTAL SOLIDS CONCENTRATION, HAVING A PH OF 8.5 TO 9.5, AND CONTAINING A PIGMENT COMPRISING A PREDOMINANT PROPORTION OF CLAY AND 8% TO 25%, ON THE TOTAL WEIGHT OF PIGMENT, OF A WATER-INSOLUBLE, NEUTRAL 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 AMIDE SELECTED FROM THE GROUP
Claim 2
Independent Claim
97 words
A METHOD OF PRODUCING MINERAL-COATED PAPER WHICH COMPRISES COATING AT LEAST ONE SIDE OF A PAPER SHEET WITH AN AQUEOUS DISPERSION OF 40% TO 70% TOTAL SOLIDS CONCENTRATION, HAVING A PH OF 8.5 TO 9.5, AND CONTAINING A PIGMENT COMPRISING A PREDOMINANT PROPORTION OF CLAY AND 8% TO 25%, ON THE TOTAL WEIGHT OF PIGMENT, OF A WATER-INSOLUBLE, NEUTRAL 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 AMIDE SELECTED FROM THE GROUP
References Cited (Backward Citations)
US2661309A
Cited
US2661308A
Cited
US2719831A
Cited
US2719832A
Cited
US2751315A
Cited
US2748029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |