US3691052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Value metal base electrode coated with pb2ru2o6 or pb2ir2o6
Assignee: Engelhard Minerals and Chemicals Corp
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Filing: 1971-01-07
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Granted: 1972-09-12
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Expires: 1991-01-07
Abstract
Abstract ELECTROLYSIS OF BRINES IN ACCOMPLISHED WITH ANODES HAVING AN OPERATIVE SURFACE OF LEAD RUTHENATE OR LEAD IRIDATE. THE ANODES ARE PARTICULARLY EFFECTIVE FOR THE PRODUCTION OF CHLORINE. IT HAS BEEN FOUND THAT LEAD RUTHENATE OR LEAD IRIDATE POWDER MAY BE BONDED TO A VALUE METAL SUBSTRATE BY USING A LOW MELTING GLASS FLUX. ONE GROUP OF GLASSES EXISTS IN THE V2O5PBO SYSTEM, CONSISTING OF V2O5 PLUS ABOUT 30 TO 55 MOL PERCENT OF PBO. OTHER TYPES OF FLUXES ARE LEAD BOROSILICATE GLASS OR LEAD BORATE: BISMUTH SUBNITRATE IN THE PROPORTION OF 2:1 PARTS BY WEIGHT.
Inventors
- 👤 Robert C Langley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:07
CPC Classifications
C; C10; C10G; C10G47/00; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/075; C25B11/091; C25B11/093; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/94
Claims Analysis
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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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |