US2772970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making fibrous sheet material containing a synthetic rubber binder
Assignee: Armstrong World Industries Inc
•
Filing: 1952-04-04
•
Granted: 1956-12-04
•
Expires: 1972-04-04
Abstract
No abstract record available.
Inventors
- 👤 Jr David A Feigley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:52
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/66; D21H11/00; D21H11/12; D21H17/03; D21H17/05; D21H17/14; D21H17/15; Y; Y10; Y10S; Y10S260/00; Y10S260/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE METHOD OF MAKING FIBROUS SHEET MATERIAL CONTAINING A SYNTHETIC RUBBER BINDER COMPRISING FORMING A SLURRY CONTAINING PAPERMAKING FIBERS, A SYNTHETIC RUBBER LATEX, AND ABOUT 2% TO ABOUT 20% BY WEIGHT BASED ON SAID BINDER OF A COAGULATING AGENT WHICH IS A WATERSOLUBLE REACTION PRODUCT OF RELATIVE PROPORTIONS OF ABOUT 1 EQUIVALENT WEIGHT OF A WATER-SOLUBLE ALUMINUM SALT AND AT LEAST ABOUT 0.6 EQUIVALENT WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE ALPHAOMEGA, CARBON CHAIN, ALIPHATIC POLYCARBOXYLIC ACIDS AND WATER-SOLUBLE SALTS THEREOF, AGITATING THE RESULTING SLURRY TO COAGULATE THE SOLIDS CONTENT OF SAID LATEX ONTO SAID FIBERS, AND FORMING THE SLURRY OF COATED FIBERS INTO A SHEET.
Claim 2
Independent Claim
110 words
THE METHOD OF MAKING FIBROUS SHEET MATERIAL CONTAINING A SYNTHETIC RUBBER BINDER COMPRISING FORMING A SLURRY CONTAINING PAPERMAKING FIBERS, A SYNTHETIC RUBBER LATEX, AND ABOUT 2% TO ABOUT 20% BY WEIGHT BASED ON SAID BINDER OF A COAGULATING AGENT WHICH IS A WATERSOLUBLE REACTION PRODUCT OF RELATIVE PROPORTIONS OF ABOUT 1 EQUIVALENT WEIGHT OF A WATER-SOLUBLE ALUMINUM SALT AND AT LEAST ABOUT 0.6 EQUIVALENT WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE ALPHAOMEGA, CARBON CHAIN, ALIPHATIC POLYCARBOXYLIC ACIDS AND WATER-SOLUBLE SALTS THEREOF, AGITATING THE RESULTING SLURRY TO COAGULATE THE SOLIDS CONTENT OF SAID LATEX ONTO SAID FIBERS, AND FORMING THE SLURRY OF COATED FIBERS INTO A SHEET.
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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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |