US2678890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of cast-coating paper
Assignee: Warren SD Co
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Filing: 1951-01-22
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Granted: 1954-05-18
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Expires: 1971-01-22
Abstract
No abstract record available.
Inventors
- 👤 Philip S Leighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:29
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/08; D21H25/12; D21G; D21G9/00; D21G9/009; D21H25/14; D21H5/00; D21H5/0005; D21H5/006; D21H5/0062; D21H5/0067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
PROCESS WHICH COMPRISES APPLYING TO A PAPER BASE A COATING OF AN AQUEOUS MINERAL-COATING COMPOSITION, DIRECTLY RUNNING THE WET COATED SURFACE INTO A NIP AGAINST A HEATED SOLID SURFACE, SUPPLYING TO SAID NIP AN AQUEOUS LIQUID FREE OF SUSPENDED SOLIDS AND WITHDRAWING AQUEOUS LIQUID FROM SAID NIP, THE RATE OF SUPPLY OF SAID LIQUID TO SAID NIP AND THE RATE OF WITHDRAWAL OF SAID LIQUID FROM SAID NIP BEING REGULATED TO MAINTAIN A POOL OF LIQUID SUBSTANTIALLY FREE OF SAID MINERAL COATING COMPOSITION IN SAID NIP, AND HOLDING SAID COATED SURFACE IN CONTACT WITH SAID HEATED SOLID SURFACE UNTIL SAID COATING COMPOSITION IS SUBSTANTIALLY DRY.
Claim 2
Dependent Claim
105 words
PROCESS WHICH COMPRISES APPLYING TO A PAPER BASE A COATING OF AN AQUEOUS MINERAL-COATING COMPOSITION, DIRECTLY RUNNING THE WET COATED SURFACE INTO A NIP AGAINST A HEATED SOLID SURFACE, SUPPLYING TO SAID NIP AN AQUEOUS LIQUID FREE OF SUSPENDED SOLIDS AND WITHDRAWING AQUEOUS LIQUID FROM SAID NIP, THE RATE OF SUPPLY OF SAID LIQUID TO SAID NIP AND THE RATE OF WITHDRAWAL OF SAID LIQUID FROM SAID NIP BEING REGULATED TO MAINTAIN A POOL OF LIQUID SUBSTANTIALLY FREE OF SAID MINERAL COATING COMPOSITION IN SAID NIP, AND HOLDING SAID COATED SURFACE IN CONTACT WITH SAID HEATED SOLID SURFACE UNTIL SAID COATING COMPOSITION IS SUBSTANTIALLY DRY.
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) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |