US3046263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coagulation of colloidal polytetrafluoroethylene dispersions
Assignee: EIDP Inc
•
Filing: 1959-07-10
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Granted: 1962-07-24
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Expires: 1979-07-10
Abstract
No abstract record available.
Inventors
- 👤 Whitlock Harold Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:22
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/16; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; Y; Y10; Y10S; Y10S260/00; Y10S260/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A PROCESS FOR THE CONTINUOUS COAGULATION OF AQUEOUS POLYTETRAFLUOROETHYLENE BY USE OF MECHANICAL ENERGY WHICH COMPRISES SUBJECTING AN AQUEOUS, COLLOIDAL, DISPERSION OF POLYTETRAFLUORETHYLENE CONTAINING 5 TO 50 WEIGHT PERCENT OF POLYTETRAFLUOROETHLENE, BASED ON THE TOTAL COMPOSITION TO ENERGY BY (1) SUBJECTING SAID DISPERSION TO INTENSE AGITATION, THE AMOUNT OF ENERGY IMPARTED TO SAID DISPERSION BY SAID INTENSE AGITATION BEING IN THE RANGE OF 1 TO 100 HORSEPOWER-SECONDS PER GALLON OF DISPERSION; (2) THEREAFTER PASSING SAID DISPERSION UNDER SUFFICIENT APPLIED PRESSURE THROUGH CAPILLARY PIPE, THE DIAMETER OF SAID CAPILLARY PIPE BEING REDUCED TO RESULT IN A PRESSURE DROP IN THE RANGE OF 0.5 TO 20 P.S.I. AND (3) THEREAFTER SUBJECTING SAID DISPERSION TO AGITATION IN THE PRESENCE OF AIR, THE AMOUNT OF ENERGY APPLIED TO SAID DISPERSION BEING IN THE AMOUNT OF 0.25 TO 50 HORSEPOWERSECONDS PER GALLON OF DISPERSION AND (4) ON SEPARATION
Claim 2
Dependent Claim
143 words
A PROCESS FOR THE CONTINUOUS COAGULATION OF AQUEOUS POLYTETRAFLUOROETHYLENE BY USE OF MECHANICAL ENERGY WHICH COMPRISES SUBJECTING AN AQUEOUS, COLLOIDAL, DISPERSION OF POLYTETRAFLUORETHYLENE CONTAINING 5 TO 50 WEIGHT PERCENT OF POLYTETRAFLUOROETHLENE, BASED ON THE TOTAL COMPOSITION TO ENERGY BY (1) SUBJECTING SAID DISPERSION TO INTENSE AGITATION, THE AMOUNT OF ENERGY IMPARTED TO SAID DISPERSION BY SAID INTENSE AGITATION BEING IN THE RANGE OF 1 TO 100 HORSEPOWER-SECONDS PER GALLON OF DISPERSION; (2) THEREAFTER PASSING SAID DISPERSION UNDER SUFFICIENT APPLIED PRESSURE THROUGH CAPILLARY PIPE, THE DIAMETER OF SAID CAPILLARY PIPE BEING REDUCED TO RESULT IN A PRESSURE DROP IN THE RANGE OF 0.5 TO 20 P.S.I. AND (3) THEREAFTER SUBJECTING SAID DISPERSION TO AGITATION IN THE PRESENCE OF AIR, THE AMOUNT OF ENERGY APPLIED TO SAID DISPERSION BEING IN THE AMOUNT OF 0.25 TO 50 HORSEPOWERSECONDS PER GALLON OF DISPERSION AND (4) ON SEPARATION
References Cited (Backward Citations)
US2495147A
Cited
US2593583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |