US2500972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of clay coated sheet material
Assignee: Warren SD Co
•
Filing: 1945-02-14
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Granted: 1950-03-21
•
Expires: 1965-02-14
Abstract
No abstract record available.
Inventors
- 👤 Alfred D Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:38
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40; D21H19/44; D21H19/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
PAPER COATING COMPOSITION COMPRISING WATER, WATER-DISPERSIBLE ADHESIVE, AND A CLAY PRODUCT WHICH HAS BEEN PRODUCED BY DEWATERING BY EVAPORATION TO NON-FLUID CONDITION AN AQUEOUS SUSPENSION OF CLAY DEFLOCCULATED WITH A SOLUBLE POLYPHOSPHATE, AND CLAY PRODUCT BEING CHARACTERIZED BY AN ADHESIVE REQUIREMENT SUBSTANTIALLY LESS THAN THAT OF THE SAME CLAY UNTREATED.
Claim 2
Dependent Claim
50 words
PAPER COATING COMPOSITION COMPRISING WATER, WATER-DISPERSIBLE ADHESIVE, AND A CLAY PRODUCT WHICH HAS BEEN PRODUCED BY DEWATERING BY EVAPORATION TO NON-FLUID CONDITION AN AQUEOUS SUSPENSION OF CLAY DEFLOCCULATED WITH A SOLUBLE POLYPHOSPHATE, AND CLAY PRODUCT BEING CHARACTERIZED BY AN ADHESIVE REQUIREMENT SUBSTANTIALLY LESS THAN THAT OF THE SAME CLAY UNTREATED.
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) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |