US2867549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for flameproofing paper
Assignee: Albemarle Paper Manufacturing Co
•
Filing: 1956-03-06
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Granted: 1959-01-06
•
Expires: 1976-03-06
Abstract
No abstract record available.
Inventors
- 👤 Charles R Outterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:14
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/34; D21H17/00; D21H17/62; D21H5/00; D21H5/0002; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR FLAMEPROOFING PAPER WHICH COMPRISES IMPREGNATING AN AT LEAST PARTIALLY SIZED PAPER SHEET WITH A SUSPENSION COMPRISING ROSIN DISPERSED IN A SOLUTION OF WATER-SOLUBLE FLAMEPROOFING SALTS, THE FLAMEPROOFING SALTS BEING CHARACTERIZED BY A MAXIMUM PH OF ABOUT 7 AND BEING INCORPORATED IN THE PAPER IN AN AMOUNT SUFFICIENT TO RENDER SAID PAPER SUBSTANTIALLY FLAMEPROOF, SAID ROSIN BEING INCORPORATED IN THE PAPER IN AN AMOUNT SUFFICIENT TO IMPART SUBSTANTIAL WATER RESISTANCE TO SAID WATERSOLUBLE FLAMEPROOFING SALTS.
Claim 2
Dependent Claim
77 words
A PROCESS FOR FLAMEPROOFING PAPER WHICH COMPRISES IMPREGNATING AN AT LEAST PARTIALLY SIZED PAPER SHEET WITH A SUSPENSION COMPRISING ROSIN DISPERSED IN A SOLUTION OF WATER-SOLUBLE FLAMEPROOFING SALTS, THE FLAMEPROOFING SALTS BEING CHARACTERIZED BY A MAXIMUM PH OF ABOUT 7 AND BEING INCORPORATED IN THE PAPER IN AN AMOUNT SUFFICIENT TO RENDER SAID PAPER SUBSTANTIALLY FLAMEPROOF, SAID ROSIN BEING INCORPORATED IN THE PAPER IN AN AMOUNT SUFFICIENT TO IMPART SUBSTANTIAL WATER RESISTANCE TO SAID WATERSOLUBLE FLAMEPROOFING SALTS.
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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) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |