Patent US3018276A successfully refreshed from Google Patents.
US3018276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing chlorotrifluoroethylene and mixtures thereof with vinylidene fluoride
Assignee: Honeywell International Inc
•
Filing: 1956-10-03
•
Granted: 1962-01-23
•
Expires: 1976-10-03
Abstract
No abstract record available.
Inventors
- 👤 Bandes Selwyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:06
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE PROCESS WHICH COMPRISES POLYMERIZING A MEMBER OF THE GROUP CONSISTING OF CHLOROTRIFLUOROETHYLENE AND MIXTURES CONTAINING CHLOROTRIFLYOROETHYLENE AND UP TO ABOUT 50% BY WEIGHT OF VINYLIDENE FLUORIDE IN AN AQUEOUS SUSPENSION MEDIUM CONSISTING ESSENTIALLY OF WATER, A WATER-SOLUBLE PERPHOSPHATE AND A WATER-SOLUBLE REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF BISULFITES, HYDROSULFITES, SULFIDES, THIOSULFATES, HYDRAZINE AND HYDROXYLAMINE, AT A TEMPERATURE OF ABOUT 0* TO ABOUT 50*C. FOR A PERIOD OF AT LEAST ABOUT 31/2 HOURS, MAINTAINING SAID AQUEOUS SUSPENSION MEDIUM AT A PH BETWEEN 6.5 AND 8.5 DURING THE COURSE OF THE POLYMERIZATION, THEREBY PRODUCING A POLYMER IN AT LEAST ABOUT 80% YIELD, AND SEPARATING SAID POLYMER AS PRODUCT.
Claim 2
Dependent Claim
109 words
THE PROCESS WHICH COMPRISES POLYMERIZING A MEMBER OF THE GROUP CONSISTING OF CHLOROTRIFLUOROETHYLENE AND MIXTURES CONTAINING CHLOROTRIFLYOROETHYLENE AND UP TO ABOUT 50% BY WEIGHT OF VINYLIDENE FLUORIDE IN AN AQUEOUS SUSPENSION MEDIUM CONSISTING ESSENTIALLY OF WATER, A WATER-SOLUBLE PERPHOSPHATE AND A WATER-SOLUBLE REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF BISULFITES, HYDROSULFITES, SULFIDES, THIOSULFATES, HYDRAZINE AND HYDROXYLAMINE, AT A TEMPERATURE OF ABOUT 0* TO ABOUT 50*C. FOR A PERIOD OF AT LEAST ABOUT 31/2 HOURS, MAINTAINING SAID AQUEOUS SUSPENSION MEDIUM AT A PH BETWEEN 6.5 AND 8.5 DURING THE COURSE OF THE POLYMERIZATION, THEREBY PRODUCING A POLYMER IN AT LEAST ABOUT 80% YIELD, AND SEPARATING SAID POLYMER AS PRODUCT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |