US3418232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anolyte liquid level control for chlor-alkali diaphragm cells
Assignee: Hooker Chemical Corp
•
Filing: 1965-11-29
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Granted: 1968-12-24
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Expires: 1985-11-29
Abstract
No abstract record available.
Inventors
- 👤 Alvin T Emery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:24
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/17; C25B9/19; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B15/00; C25B15/08; C25B15/087; G; G05; G05D; G05D9/00; G05D9/02; C25B9/60; Y; Y10; Y10T; Y10T137/00; Y10T137/4456; Y10T137/4463; Y10T137/4576; Y10T137/4606; Y10T137/4613; Y10T137/8593; Y10T137/86236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |