US3763029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical equipment structures
Assignee: Individual
•
Filing: 1971-10-19
•
Granted: 1973-10-02
•
Expires: 1991-10-19
Abstract
Abstract An insulator to be used on electrolytic copper refining cells to support the bus bars and electrodes is constructed of a thin sheet of polyvinylchloride thermoformed into a pan shaped cavity into which is cast a mixture of polyester resin and quartz sand. After casting, the piece is inverted and strips of more refractory material such as chlorinated polyvinylchloride are cemented onto the insulator where the hot bus bar will contact the insulator in service.
Inventors
- 👤 W Karn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:27
CPC Classifications
C; C25; C25C; C25C7/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
A bus bar insulator support for electrolytic cells comprising a shell formed from sheet polyvinylchloride and having a rigid core formed by casting a mixture of polyester resin and sand in said shelL.
Claim 2
Dependent Claim
33 words
The bus bar insulator support of claim 1 wherein said shell has pads of chlorinated polyvinylchloride attached to the surface of said shell in the bus bar support bearing regions of said shell.
Claim 3
Dependent Claim
33 words
The bus bar insulator support of claim 1 wherein said shell has pads of glass fiber attached to the surface of said shell in the bus bar support bearing regions of said shell.
Claim 4
Dependent Claim
33 words
The bus bar insulator support of claim 2 wherein said shell has pads of chlorinated polyvinylchloride attached to the surface of said shell in the bus bar support bearing regions of said shell.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |