Patent US3830770A successfully refreshed from Google Patents.
US3830770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage stable filler-containing aqueous dispersion of tetrafluoroethylene polymer
Assignee: EIDP Inc
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Filing: 1972-06-02
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Granted: 1974-08-20
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Expires: 1992-06-02
Abstract
Abstract FILLER-CONTAINING AQUEOUS DISPERSIONS OF TETRAFLUOROETHYLENE POLYMER HAVING GOOD SHELF LIFE ARE PROVIDED, SAID DISPERSIONS CONTAINING FROM 5 TO 8% BY WT. (POLYMER SOLIDS BASIS) OF NONIONIC SURFACTANT AND SUFFICIENT WATER SOLUBLE ELECTROLYTE, E.G. BANO3, NACL, NACO2CO3, AND AMMONIUM ACETATE, TO GIVE THE DISPERSION AND IONIC STRENGTH OF AT LEAST 0.01 MOLES PER KILOGRAM OF DISPERSION, THE DISPERSION HAVING A VISCOSITY OF AT LEAST 50 CENTIPOISES.
Inventors
- 👤 R Ribbans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:51
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |