Patent US3856564A successfully refreshed from Google Patents.
US3856564A
Expired / Lapsed
US
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Paper coated with clay and asbestos
Assignee: Domtar Inc
•
Filing: 1973-08-07
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Granted: 1974-12-24
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Expires: 1993-08-07
Abstract
Abstract A coated paper utilizing a clay coating containing asbestos in the amount of 0.1 to 10 percent based on the weight of clay.
Inventors
- 👤 W Kirkham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:22
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40; D21H19/44; D21H13/00; D21H13/36; D21H13/38; D21H13/42; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31659
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A COATED PAPER COMPRISING A SUBSTRATE OF PAPER AND A COATING CONSISTING ESSENTIALLY OF CLAY AND ASBESTOS AND A BINDER, SAID ASBESTOS BEING PRESENT IN THE AMOUNT OF 0.1 TO 10 PERCENT BASED ON THE WEIGHT OF TE CLAY SAID BINDER BEING PRESENT IN THE AMOUT OF 10 PERCENT-20 PERCENT BASED ON THE WEIGHT OF SAID CLAY, AND SAID COATING BEING UNIFORMLY DISTRIBUTED OVER AT LEAST ONE SURFACE OF THE SUBSTRATE.
Claim 2
Dependent Claim
71 words
A COATED PAPER COMPRISING A SUBSTRATE OF PAPER AND A COATING CONSISTING ESSENTIALLY OF CLAY AND ASBESTOS AND A BINDER, SAID ASBESTOS BEING PRESENT IN THE AMOUNT OF 0.1 TO 10 PERCENT BASED ON THE WEIGHT OF TE CLAY SAID BINDER BEING PRESENT IN THE AMOUT OF 10 PERCENT-20 PERCENT BASED ON THE WEIGHT OF SAID CLAY, AND SAID COATING BEING UNIFORMLY DISTRIBUTED OVER AT LEAST ONE SURFACE OF THE SUBSTRATE.
Claim 3
Dependent Claim
27 words
A coated web as defined in claim 1 wherein said asbestos is present in the amount of 0.5 to 5 percent based on the weight of clay.
Claim 4
Dependent Claim
27 words
A coated web as defined in claim 1 wherein said asbestos is present in the amount of 1 to 3 percent based on the weight of clay.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |