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US2116138A
Expired / Lapsed
US
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Apparatus for the electrolytic production of chromic acid and caustic alkali
Assignee: CHROMIUM PRODUCTS Corp
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Filing: 1936-10-12
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Granted: 1938-05-03
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Expires: 1956-10-12
Abstract
No abstract record available.
Inventors
- 👤 John W Boss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:42
CPC Classifications
C; C01; C01G; C01G37/00; C01G37/02; C01G37/033
Claims Analysis
Total Claims: 0
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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) | 1941-05-02 | 1941-11-01 | 1942-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-05-02 | 1945-11-01 | 1946-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-05-02 | 1949-11-01 | 1950-05-03 | $7700.00 | Window Closed / Lapsed |