US3223579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment coated paper including polyvinyl alcohol binder as hardboard overlay
Assignee: Individual
•
Filing: 1962-10-01
•
Granted: 1965-12-14
•
Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Rodger M Dorland
- 👤 Maxwell M Yan
- 👤 Stanley H Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:22
CPC Classifications
D; D21; D21J; D21J1/00; D21H; D21H27/00; D21H27/30; D21H27/38; D21J1/08; D21H11/00; D21H11/08; D21H17/00; D21H17/02; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; D21H17/60; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
THE METHOD OF FORMING HARDBOARD COMPRISING THE STEPS OF APPLYING TO A WET LAP OF COARSE FIBROUS WOOD PULP WHICH HAS BEEN PARTIALLY DEWATERED TO A SOLIDS CONTENT OF 25 TO 40%, A SHEET OF PAPER WHICH HAS BEEN COATED ON ONE SURFACE WITH A COATING COMPRISING A PIGMENT AND A POLYVINYL ALCOHOL BINDER IN THE AMOUNT OF ABOUT 5 TO 10% BY WEIGHT OF HE PIGMENT, SAID SHEET OF PAPER HAVING BEEN APPLIED TO SAID PARTIALLY DEWATERED WET LAP WITH ITS SURFACE WHICH HAS NOT BEEN COATED WITH THE PIGMENT AND THE POLYVINYL ALCOHOL FACING THE PARTIALLY DEWATERED WET LAP, AND CONSOLIDATING THE WET LAP AND THE COATED PAPER UNDER SIMLTANEOUS HEAT AND PRESSURE TO FORM HARDBOARD HAVING SAID COATED PAPER BONDED TO ITS SURFACE.
Claim 2
Independent Claim
126 words
THE METHOD OF FORMING HARDBOARD COMPRISING THE STEPS OF APPLYING TO A WET LAP OF COARSE FIBROUS WOOD PULP WHICH HAS BEEN PARTIALLY DEWATERED TO A SOLIDS CONTENT OF 25 TO 40%, A SHEET OF PAPER WHICH HAS BEEN COATED ON ONE SURFACE WITH A COATING COMPRISING A PIGMENT AND A POLYVINYL ALCOHOL BINDER IN THE AMOUNT OF ABOUT 5 TO 10% BY WEIGHT OF HE PIGMENT, SAID SHEET OF PAPER HAVING BEEN APPLIED TO SAID PARTIALLY DEWATERED WET LAP WITH ITS SURFACE WHICH HAS NOT BEEN COATED WITH THE PIGMENT AND THE POLYVINYL ALCOHOL FACING THE PARTIALLY DEWATERED WET LAP, AND CONSOLIDATING THE WET LAP AND THE COATED PAPER UNDER SIMLTANEOUS HEAT AND PRESSURE TO FORM HARDBOARD HAVING SAID COATED PAPER BONDED TO ITS SURFACE.
Claim 3
Dependent Claim
63 words
A HARDBOARD HAVING AN OVERLAY ON AT LEAST ONE SURFACE THEREOF, SAID OVERLAY CONSISTING IN A SHEET OF PAPER HAVING AN OPAQUE COATING COMPRISING A PIGMENT AND A POLYVINYL ALCOHOL BINDER ON ITS OUTER SURFACE AND SAID SHEET OF PAPER BEING INTEGRALLY UNITED WITH SAID SURFACE OF SAID HARDBOARD BY AN ADHESIVE COMPRISING THE NATURAL BINDING CONSTITUENTS OF THE FURNISH FOR SAID HARDBOARD.
Claim 4
Dependent Claim
63 words
A HARDBOARD HAVING AN OVERLAY ON AT LEAST ONE SURFACE THEREOF, SAID OVERLAY CONSISTING IN A SHEET OF PAPER HAVING AN OPAQUE COATING COMPRISING A PIGMENT AND A POLYVINYL ALCOHOL BINDER ON ITS OUTER SURFACE AND SAID SHEET OF PAPER BEING INTEGRALLY UNITED WITH SAID SURFACE OF SAID HARDBOARD BY AN ADHESIVE COMPRISING THE NATURAL BINDING CONSTITUENTS OF THE FURNISH FOR SAID HARDBOARD.
References Cited (Backward Citations)
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US2668124A
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US2918398A
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US2759847A
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |