US2919205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Warren SD Co
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Filing: 1956-09-18
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Granted: 1959-12-29
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Expires: 1976-09-18
Abstract
No abstract record available.
Inventors
- 👤 Hart Robert Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:57
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/08; D21H25/12; D21H25/14; D21H5/00; D21H5/0005; D21H5/006; D21H5/0062; D21H5/0067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A METHOD OF TREATING A WEB OF PAPER WHICH HAS A GELLED BUT STILL PLASTIC MINERAL COATING LAYER THEREON WITH WATER AT THE SURFACE THEREOF AND IN A SUFFICIENTLY PLASTIC STATE TO YIELD IN FORMING RELATION TO A FORMING SURFACE WHICH PROCESS INCLUDES LEADING SAID WEB THROUGH AS NIP BETWEEN A PAIR OF TURNING ROLLS, THE ROLL WHICH ABUTS THE WET COATING LAYER HAVING A FORMING SURFACE AND BEING MAINTAINED AT A TEMPERATURE OF OVER 100* C. THEREBY HEATING THE WATER AT SAID COATING SURFACE IN SAID NIP TO AT LEAST 100* C. WHILE SUBSTANTIALLY PREVENTING THE VAPORIZATION OF WATER AT SAID COATING SURFACE BY CONFINING THE WEB IN SAID NIP UNDER PRESSURE IN EXCESS OF THE VAPOR PRESSURE OF WATER AT THE TEMPERATURE OF SAID FORMING SURFACE, AND MOVING SAID WEB BEYOND SAID NIP TO PRODUCE A FLASH VAPORIZATION OF SAID WATER, AND RENDERING SAID WET COATING LAYER SUFFICICENTLY GELLED AND COHESIVE AT THE TIME OF SAID FLASH VAPORIZATION TO REMAIN SMOOTH AND UNIFORM BEYOND SAID NIP DURING THE FLASH DRYING THEREOF.
Claim 2
Independent Claim
173 words
A METHOD OF TREATING A WEB OF PAPER WHICH HAS A GELLED BUT STILL PLASTIC MINERAL COATING LAYER THEREON WITH WATER AT THE SURFACE THEREOF AND IN A SUFFICIENTLY PLASTIC STATE TO YIELD IN FORMING RELATION TO A FORMING SURFACE WHICH PROCESS INCLUDES LEADING SAID WEB THROUGH AS NIP BETWEEN A PAIR OF TURNING ROLLS, THE ROLL WHICH ABUTS THE WET COATING LAYER HAVING A FORMING SURFACE AND BEING MAINTAINED AT A TEMPERATURE OF OVER 100* C. THEREBY HEATING THE WATER AT SAID COATING SURFACE IN SAID NIP TO AT LEAST 100* C. WHILE SUBSTANTIALLY PREVENTING THE VAPORIZATION OF WATER AT SAID COATING SURFACE BY CONFINING THE WEB IN SAID NIP UNDER PRESSURE IN EXCESS OF THE VAPOR PRESSURE OF WATER AT THE TEMPERATURE OF SAID FORMING SURFACE, AND MOVING SAID WEB BEYOND SAID NIP TO PRODUCE A FLASH VAPORIZATION OF SAID WATER, AND RENDERING SAID WET COATING LAYER SUFFICICENTLY GELLED AND COHESIVE AT THE TIME OF SAID FLASH VAPORIZATION TO REMAIN SMOOTH AND UNIFORM BEYOND SAID NIP DURING THE FLASH DRYING THEREOF.
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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |