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US2976257A
Expired / Lapsed
US
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Re-etfspersible dispersion of polytetra-
Assignee: —
•
Filing: —
•
Granted: 1961-03-21
•
Expires: 1978-03-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
C; C08; C08L; C08L63/00; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08L75/00; C08L75/04; C08L2205/00; C08L2205/03; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/14; C08L2666/16; C08L2666/20; C08L2666/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A RE-DISPERSIBLE DISPERSION COMPRISING FINELY DIVIDED POLYTETRAFLUOROETHYLENE, AT LEAST ONE THEREMOSETTABLE RESIN DISSOLVED IN A SOLVENT, SAID DISPERSION CONTAINING LESS THAN ABOUT 25% COMBINED POLYTETRAFLUOROETHYLENE AND THERMOSETTABLE RESIN SOLIDS, BY WEIGHT OF SAID DISPERSION, AND AT LEAST ABOUT 5% TO ABOUT 15% OF A STABILIZING AGENT SELECTED FROM THE GROUP CONSISTING OF VINYL RESINS AND CELLULOSIC RESINS, BY WEIGHT OF SAID SAID THERMOSETTABLE RESIN, SAID DISPERSION HAVING THE CHARACTERISTIC OF SETTLING AN AMOUNT IN THE RANGE OF ABOUT ONE-FIFTH TO ABOUT NINETENTHS OF THE DEPTH OF SAID DISPERSION IN TWO TO FIVE HOURS.
Claim 2
Dependent Claim
93 words
A RE-DISPERSIBLE DISPERSION COMPRISING FINELY DIVIDED POLYTETRAFLUOROETHYLENE, AT LEAST ONE THEREMOSETTABLE RESIN DISSOLVED IN A SOLVENT, SAID DISPERSION CONTAINING LESS THAN ABOUT 25% COMBINED POLYTETRAFLUOROETHYLENE AND THERMOSETTABLE RESIN SOLIDS, BY WEIGHT OF SAID DISPERSION, AND AT LEAST ABOUT 5% TO ABOUT 15% OF A STABILIZING AGENT SELECTED FROM THE GROUP CONSISTING OF VINYL RESINS AND CELLULOSIC RESINS, BY WEIGHT OF SAID SAID THERMOSETTABLE RESIN, SAID DISPERSION HAVING THE CHARACTERISTIC OF SETTLING AN AMOUNT IN THE RANGE OF ABOUT ONE-FIFTH TO ABOUT NINETENTHS OF THE DEPTH OF SAID DISPERSION IN TWO TO FIVE HOURS.
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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |