Patent US3433729A successfully refreshed from Google Patents.
US3433729A
Expired / Lapsed
US
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Apparatus for producing hydrogen and oxygen
Assignee: Individual
•
Filing: 1966-02-16
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Granted: 1969-03-18
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Expires: 1986-02-16
Abstract
No abstract record available.
Inventors
- 👤 Lev Mikhailovich Proskuryakov
- 👤 Valentin Grigorievich Zizin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:45
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/17; C25B9/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1032623A
Cited
US1380183A
Cited
US1905627A
Cited
US2079950A
Cited
FR868314A
Cited
US3330755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |