US2940892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asbestos fiber treatment
Assignee: Armstrong World Industries Inc
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Filing: 1957-09-03
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Granted: 1960-06-14
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Expires: 1977-09-03
Abstract
No abstract record available.
Inventors
- 👤 Jr David A Feigley
- 👤 Jr Leonard N Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:26
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/04; D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/14; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A WATER-LAID SHEET COMPRISING CHRYSOTILE ASBESTOS FIBERS WHOSE SURFACES ARE REACTED WITH ABOUT 0.2-11% BY WEIGHT BASED ON THE DRY WEIGHT OF THE FIBERS OF A WATERSOLUBLE SALT OF AN ALIPHATIC ORGANIC COMPOUND BEING SELECTED LEAST 10 CARBON ATOMS, SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS, POLYMERIZED FATTY ACIDS, ROSIN ACIDS, POLYMERIZED ROSIN ACIDS, THE REACTION PRODUCT OF AN UNSATURATED ORGANIC ACID AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ANHYDRIDE, AND MIXTURE THEREOF.
Claim 2
Dependent Claim
83 words
A WATER-LAID SHEET COMPRISING CHRYSOTILE ASBESTOS FIBERS WHOSE SURFACES ARE REACTED WITH ABOUT 0.2-11% BY WEIGHT BASED ON THE DRY WEIGHT OF THE FIBERS OF A WATERSOLUBLE SALT OF AN ALIPHATIC ORGANIC COMPOUND BEING SELECTED LEAST 10 CARBON ATOMS, SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS, POLYMERIZED FATTY ACIDS, ROSIN ACIDS, POLYMERIZED ROSIN ACIDS, THE REACTION PRODUCT OF AN UNSATURATED ORGANIC ACID AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ANHYDRIDE, AND MIXTURE 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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |