Patent EP0280743A1 successfully refreshed from Google Patents.
Patent US2645553A successfully refreshed from Google Patents.
US2645553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coloring woven glass fibers
Assignee: GAF Chemicals Corp
•
Filing: 1948-12-29
•
Granted: 1953-07-14
•
Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 Charles L Lawsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:59
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/465; C03C25/475
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE PROCESS OF COLORING A WOVEN GLASS FABRIC WHICH CONSISTS OF TREATING FOR ABOUT 1 HOUR SAID FABRIC AT A TEMPERATURE IN THE RANGE 75* C. TO THE BOILING POINT WITH AN AQUEOUS SOLUTION CONTAINING AN ALKALINE MATERIAL, AND CONTAINING A LIGNIN SULPHONIC ACID, SAID SOLUTION HAVING A PH IN THE RANGE 9 TO 13 AND TREATING SAID FABRIC WITH A DYESTUFF NOT REQUIRING A CHEMICAL REDUCTION FOR APPLICATION.
Claim 2
Dependent Claim
69 words
THE PROCESS OF COLORING A WOVEN GLASS FABRIC WHICH CONSISTS OF TREATING FOR ABOUT 1 HOUR SAID FABRIC AT A TEMPERATURE IN THE RANGE 75* C. TO THE BOILING POINT WITH AN AQUEOUS SOLUTION CONTAINING AN ALKALINE MATERIAL, AND CONTAINING A LIGNIN SULPHONIC ACID, SAID SOLUTION HAVING A PH IN THE RANGE 9 TO 13 AND TREATING SAID FABRIC WITH A DYESTUFF NOT REQUIRING A CHEMICAL REDUCTION FOR APPLICATION.
References Cited (Backward Citations)
US2407483A
Cited
US2315329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |