Patent US2640791A successfully refreshed from Google Patents.
US2640791A
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Coated paper
Assignee: Hercules Powder Co
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Filing: 1949-10-26
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Granted: 1953-06-02
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Expires: 1969-10-26
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:00
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/52; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A COATED PAPER HAVING A BASE OF CELLULOSIC FIBERS AND A PRINTING SURFACE CONSISTING ESSENTIALLY OF A FILM OF CONTIGUOUS, WATER-INSOLUBLE, INORGANIC PIGMENT PARTICLES INTERSPERSED IN BINDER BY MEANS OF WHICH THE PIGMENT INTERSPERSED IN BINDER BASE, SAID BINDER CONSISTING OF A WATER-SOLUBLE ORGANIC SALT OF CARBOXYMETHYL HYDROXYETHYL CELLULOSE, SAID FILM CONTAINING FROM ABOUT 5 TO ABOUT 15 PARTS BY WEIGHT OF SAID BINDER TO 100 PARTS BY WEIGHT OF THE PIGMENT.
Claim 2
Dependent Claim
72 words
A COATED PAPER HAVING A BASE OF CELLULOSIC FIBERS AND A PRINTING SURFACE CONSISTING ESSENTIALLY OF A FILM OF CONTIGUOUS, WATER-INSOLUBLE, INORGANIC PIGMENT PARTICLES INTERSPERSED IN BINDER BY MEANS OF WHICH THE PIGMENT INTERSPERSED IN BINDER BASE, SAID BINDER CONSISTING OF A WATER-SOLUBLE ORGANIC SALT OF CARBOXYMETHYL HYDROXYETHYL CELLULOSE, SAID FILM CONTAINING FROM ABOUT 5 TO ABOUT 15 PARTS BY WEIGHT OF SAID BINDER TO 100 PARTS BY WEIGHT OF THE PIGMENT.
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) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |