Patent US2739954A successfully refreshed from Google Patents.
US2739954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of adhesives and adhesive bases from synthetic rubber latex by causing phase inversion with a protective colloid and adding organic solvent
Assignee: Phillips Petroleum Co
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Filing: 1952-07-18
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Granted: 1956-03-27
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Expires: 1972-07-18
Abstract
No abstract record available.
Inventors
- 👤 Charles F Fryling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:27
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE PRODUCTION OF AN ADHESIVE BASE WHICH COMPRISES INCORPORATING INTO A HIGH SOLIDS CONTENT RUBBER LATER A SUFFICIENT AMOUNT OF PROTECTIVE COLLOID TO CAUSE PHASE INVERSION OF THE LATEX, CONVENIENTLY INDICATED BY SEPARATION OF THE POLYMER AS COAGULUM UPON ADDITION OF WATER TO THE LATEX; SUBSEQUENTLY ADDING TO THE INVERTED EMULSION A SUFFICIENT AMOUNT OF A WATER-IMMISICIBLE RUBBER SOLVENT TO DISSOLVE THE RUBBER CONTENT THEREOF, AND BY PHASE SEPARATION RECOVERING THE RUBBER-IN-SOLVENT SOLUTION FROM THE WATER ORIGINALLY PRESENT IN THE LATEX.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE PRODUCTION OF AN ADHESIVE BASE WHICH COMPRISES INCORPORATING INTO A HIGH SOLIDS CONTENT RUBBER LATER A SUFFICIENT AMOUNT OF PROTECTIVE COLLOID TO CAUSE PHASE INVERSION OF THE LATEX, CONVENIENTLY INDICATED BY SEPARATION OF THE POLYMER AS COAGULUM UPON ADDITION OF WATER TO THE LATEX; SUBSEQUENTLY ADDING TO THE INVERTED EMULSION A SUFFICIENT AMOUNT OF A WATER-IMMISICIBLE RUBBER SOLVENT TO DISSOLVE THE RUBBER CONTENT THEREOF, AND BY PHASE SEPARATION RECOVERING THE RUBBER-IN-SOLVENT SOLUTION FROM THE WATER ORIGINALLY PRESENT IN THE LATEX.
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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |