US3658742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous tetrafluoroethylene telomer dispersions
Assignee: Gillette Co LLC
•
Filing: 1968-10-07
•
Granted: 1972-04-25
•
Expires: 1988-10-07
Abstract
Abstract THE PRESENT INVENTION RELATES TO AQUEOUS DISPERSIONS OF TETRAFLUOROETHYLENE TELOMERS AND TO PROCESSES FOR PREPARING SUCH AQUEOUS DISPERSIONS FROM DISPERSIONS OF SUCH TELOMER IN TRICHLOROTRIFLUOROETHANE MEDIUMS. IN GENERAL, THE PROCESSES FOR PREPARING SUCH AQUEOUS DISPERSIONS COMPRISE ADDING A SOLVENT WHICH IS BOTH MISCIBLE WITH WATER AND THE TRICHLORFLUOROETHANE TO THE TRICHLOROTRIFLUOROETHANE DISPERSION, REMOVING THE TRICHLOROFLUOROETHANE, E.G., BY EVAPORATION, AND MIXING THE RESULTING DISPERSION WITH WATER IN THE PRESENCE OF A SUITABLE WETTING AGENT.
Inventors
- 👤 Frank H Fish
- 👤 Irwin W Fischbein
- 👤 Mandel E Slater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:09
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |