Patent US2235876A successfully refreshed from Google Patents.
Patent US2867549A successfully refreshed from Google Patents.
US2867549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for flameproofing paper
Assignee: Albemarle Paper Manufacturing Co
•
Filing: 1956-03-06
•
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 22:34
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.
References Cited (Backward Citations)
US170829A
Cited
US1310841A
Cited
US1248092A
Cited
US1581779A
Cited
US2128296A
Cited
US2178625A
Cited
US2357725A
Cited
US2387865A
Cited
US2553154A
Cited
US2640000A
Cited
US2611694A
Cited
US2566964A
Cited
US2711370A
Cited
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 |