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Patent US4554172A successfully refreshed from Google Patents.
US4554172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of repairing electrode surfaces
Assignee: Olin Corp
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Filing: 1984-07-05
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Granted: 1985-11-19
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Expires: 2004-07-05
Abstract
Abstract A method of repairing a damaged electrode surface comprises coating the damaged area with a polyhaloolefin. The coated area is cured, for example, by heat or radiation and the cured coating bonds the damaged area to the surrounding electrode surface. The method of the invention permits the "in situ" repair of electrode surfaces while preventing distortion of the electrode surface or its support members.
Inventors
- 👤 Charles H. Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:18
CPC Classifications
C; C25; C25B; C25B11/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
49 words
A method of repairing physically damaged electrode surfaces of an electrolytic cell electrode having a membrane separator in contact with the electrode surface which comprises coating the damaged area with a polyhaloolefin and curing said coating, said cured coating bonding a repaired damaged area to the surrounding electrode surface.
Claim 2
Independent Claim
49 words
A method of repairing physically damaged electrode surfaces of an electrolytic cell electrode having a membrane separator in contact with the electrode surface which comprises coating the damaged area with a polyhaloolefin and curing said coating, said cured coating bonding a repaired damaged area to the surrounding electrode surface.
Claim 3
Dependent Claim
36 words
The method of claim 1 in which the polyhaloolefin is selected from the group consisting of polymers of olefins having 2 to 3 carbon atoms which are substituted by at least one fluorine or chlorine atom.
Claim 4
Dependent Claim
16 words
The method of claim 2 in which said curing is accomplished by the application of heat.
Claim 5
Dependent Claim
16 words
The method of claim 2 in which said curing is accomplished by the application of radiation.
Claim 6
Dependent Claim
38 words
The method of claim 2 in which said polyhaloolefin is selected from the group consisting of polytetrafluoroethylene, polyvinyl fluoride, polyvinylidene fluoride, polychlorotrifluoroethylene, polyvinyl chloride, polyvinylidene chloride, chlorinated polyvinylchloride, fluorinated ethylene-propylene copolymer, ethylene-chlorotrifluoroethylene copolymer, ethylene-tetrafluoroethylene copolymer, and perfluoroalkoxy resin.
Claim 7
Dependent Claim
18 words
The method of claim 3 in which the curing temperature is from about 150° to about 250° C.
Claim 8
Dependent Claim
28 words
The method of claim 2 in which at least two layers of the polyhaloolefin are applied where each layer is cured before the application of an additional layer.
Claim 9
Dependent Claim
20 words
The method of claim 2 in which the damaged area comprises up to 20 percent of the electrode surface area.
Claim 10
Dependent Claim
20 words
The method of claim 1 in which said physically damaged electrode surfaces include those having dents, tears, cracks, and separations.
Claim 11
Independent Claim
76 words
A method of repairing damaged electrode surfaces of a membrane electrolytic cell electrodes which comprises: (a) cleaning said damaged area; (b) applying a first layer of a polyhaloolefin to said damaged area; (c) curing said first layer of polyhaloolefin; (d) applying a second layer of said polyhaloolefin to said first layer; and (e) curing said second layer, said first and second layers forming a coating which bonds the repaired damaged area to the surrounding electrode surface.
Claim 12
Independent Claim
76 words
A method of repairing damaged electrode surfaces of a membrane electrolytic cell electrodes which comprises: (a) cleaning said damaged area; (b) applying a first layer of a polyhaloolefin to said damaged area; (c) curing said first layer of polyhaloolefin; (d) applying a second layer of said polyhaloolefin to said first layer; and (e) curing said second layer, said first and second layers forming a coating which bonds the repaired damaged area to the surrounding electrode surface.
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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |