US2433871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic production of hydrogen and oxygen
Assignee: Teck Metals Ltd
•
Filing: 1944-11-25
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Granted: 1948-01-06
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Expires: 1964-11-25
Abstract
No abstract record available.
Inventors
- 👤 Sutherland Brian Porter
- 👤 Thompson Joshua Beaumont
- 👤 Simpkinson Cecil Henry
- 👤 Morris Darcy Drummond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:16
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/02; C25B1/04; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 0
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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) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |