US3499829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inclined plane mercury cathode electrolysis cells
Assignee: De Nora SpA
•
Filing: 1967-03-03
•
Granted: 1970-03-10
•
Expires: 1987-03-03
Abstract
No abstract record available.
Inventors
- 👤 Georg Messner
- 👤 Alexander Louis Barbato
- 👤 Henry William Laub
- 👤 Richard Eric Loftfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:56
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US673754A
Cited
US2719117A
Cited
US2648630A
Cited
US2872403A
Cited
US2848408A
Cited
US2898284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |