Patent US3337435A successfully refreshed from Google Patents.
US3337435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing carboxylic acid salts of fluoro telomers
Assignee: Pennwalt Corp
•
Filing: 1955-08-02
•
Granted: 1967-08-22
•
Expires: 1975-08-02
Abstract
No abstract record available.
Inventors
- 👤 Robert N Haszeldine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:59
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/263; C07C17/269; C07C17/093; C07C17/20; C07C17/202; C07C17/204; C07C17/23; C07C17/25; C07C17/272; C07C17/278; C07C17/38; C07C17/395; C07C19/00; C07C19/08; C07C19/10; C07C19/14; C07C19/16; C07C21/00; C07C21/02; C07C21/18; C07C51/00; C07C51/16; C07C53/00; C07C53/15; C07C53/19; C07C53/21; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
A METHOD OF FORMING A CARBOXYLIC ACID SALT OF THE FORMULA CF2XCCLYR''COOM, WHERE M IS AN ALKALI METAL, WHICH COMPRISES REACTING A COMPOUND OF THE FORMULA CF2XCCLYR''CFCLI, WHERE X IS SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND FLUORINE, Y IS SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND FLUORINE, AND R'' REPRESENTS AN OXIDATION RESISTANT CHAIN HAVING FROM 4 TO 40 CARBON ATOMS IN A STRAIGHT CHAIN CONFIGURATION, MADE UP OF REPEATING FLUOROALKENE UNITS, LESS THE TERMINAL CARBON ATOM OF THE LAST FLUOROALKENE UNIT, WITH MOLECULAR OXYGEN IN THE PRESENCE OF THE HYDROXIDE OF THE ALKALI METAL M, IN ADMIXTURE WITH WATER, IN THE PRESENCE OF A FREE RADICAL INITIATOR.
Claim 2
Independent Claim
111 words
A METHOD OF FORMING A CARBOXYLIC ACID SALT OF THE FORMULA CF2XCCLYR''COOM, WHERE M IS AN ALKALI METAL, WHICH COMPRISES REACTING A COMPOUND OF THE FORMULA CF2XCCLYR''CFCLI, WHERE X IS SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND FLUORINE, Y IS SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND FLUORINE, AND R'' REPRESENTS AN OXIDATION RESISTANT CHAIN HAVING FROM 4 TO 40 CARBON ATOMS IN A STRAIGHT CHAIN CONFIGURATION, MADE UP OF REPEATING FLUOROALKENE UNITS, LESS THE TERMINAL CARBON ATOM OF THE LAST FLUOROALKENE UNIT, WITH MOLECULAR OXYGEN IN THE PRESENCE OF THE HYDROXIDE OF THE ALKALI METAL M, IN ADMIXTURE WITH WATER, IN THE PRESENCE OF A FREE RADICAL INITIATOR.
Claim 3
Dependent Claim
25 words
THE METHOD OF CLAIM 1 WHEREIN THE REACTION IS CARRIED OUT IN THE PRESENCE OF ULTRAVIOLET LIGHT AND THE ALKALI METAL HYDROXIDE IS SODIUM HYDROXIDE.
References Cited (Backward Citations)
US2733277A
Cited
US2387247A
Cited
US2403207A
Cited
US2371757A
Cited
US2419198A
Cited
US2469290A
Cited
US2543530A
Cited
US2670387A
Cited
US2554219A
Cited
US2678953A
Cited
US2559752A
Cited
US2788375A
Cited
US2668864A
Cited
US2695880A
Cited
US2875253A
Cited
US2777004A
Cited
US2705229A
Cited
US2712554A
Cited
US2909570A
Cited
US2898382A
Cited
US2833831A
Cited
US2880247A
Cited
US2880248A
Cited
US2985690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |