Patent US2937156A successfully refreshed from Google Patents.
US2937156A
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Colloidal dispersions of polytetrafluoroethylene in certain alcohols, ethers, or amines and process for preparing same
Assignee: EIDP Inc
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Filing: 1954-12-22
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Granted: 1960-05-17
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Expires: 1974-12-22
Abstract
No abstract record available.
Inventors
- 👤 Berry Kenneth Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:39
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/256; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/20; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A STABLE, FLUID, COLLOIDAL DISPERSION CONSISTING OF (1) A DISPERSED PHASE IN THE AMOUNT OF 3%-70% BY WEIGHT OF SAID DISPERSION AND COMPRISING POLYTETRAFLUOROETHYLENE AND (2) A LIQUID, CONTINUOUS PHASE IN THE AMOUNT OF 97%-30% BY WEIGHT OF SAID DISPERSION AND CONSISTING OF (A) 3%-20% BY WEIGHT OF SAID DISPERSION OF WATER, (B) A MAJOR AMOUNT OF A MEMBER OF THE GROUP CONSISTING OF ETHYLENE GLYCOL, DIETHYLENE GLYCOL, GLYCEROL, ETHANOLAMINE, GLYCERON-ALPHA-MONOETHYL ETHER, DIETHANOLAMINE, TRIETHANOLAMINE, GLYCEROL-ALPHA-MONOCHLOROHYDRIN, MONACETIN, DIETHYLENE GLYCOL MONOBUTYL ETHER, DIETHYLENE GLYCOL MONOETHYL ETHER, AND DIETHYLENE TRIAMINE, AND (C) 3%-20% BY WEIGHT OF SAID POLYTETRAFLUOROETHYLENE OF AN ALKYL PHENYL MONOETHER OF A POLYGLYCOL.
Claim 2
Dependent Claim
103 words
A STABLE, FLUID, COLLOIDAL DISPERSION CONSISTING OF (1) A DISPERSED PHASE IN THE AMOUNT OF 3%-70% BY WEIGHT OF SAID DISPERSION AND COMPRISING POLYTETRAFLUOROETHYLENE AND (2) A LIQUID, CONTINUOUS PHASE IN THE AMOUNT OF 97%-30% BY WEIGHT OF SAID DISPERSION AND CONSISTING OF (A) 3%-20% BY WEIGHT OF SAID DISPERSION OF WATER, (B) A MAJOR AMOUNT OF A MEMBER OF THE GROUP CONSISTING OF ETHYLENE GLYCOL, DIETHYLENE GLYCOL, GLYCEROL, ETHANOLAMINE, GLYCERON-ALPHA-MONOETHYL ETHER, DIETHANOLAMINE, TRIETHANOLAMINE, GLYCEROL-ALPHA-MONOCHLOROHYDRIN, MONACETIN, DIETHYLENE GLYCOL MONOBUTYL ETHER, DIETHYLENE GLYCOL MONOETHYL ETHER, AND DIETHYLENE TRIAMINE, AND (C) 3%-20% BY WEIGHT OF SAID POLYTETRAFLUOROETHYLENE OF AN ALKYL PHENYL MONOETHER OF A POLYGLYCOL.
References Cited (Backward Citations)
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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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |