Patent US2909217A successfully refreshed from Google Patents.
Patent US3011964A successfully refreshed from Google Patents.
US3011964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm structure for electrolysis cells
Assignee: Ethyl Corp
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Filing: 1958-09-29
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Granted: 1961-12-05
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Expires: 1978-09-29
Abstract
No abstract record available.
Inventors
- 👤 John L Guillot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:40
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A FORAMINOUS METAL DIAPHRAGM FOR LOCATING WITHIN AN ANNULAR ELECTROLYSIS ZONE OF A FUSED SALT ELECTROLYSIS CELL COMPRISING A CYLINDRICAL WIRE GAUZE STRUCTURE HAVING A PLURALITY OF CIRCULAR SPACED-APART PARALLEL REINFORCING BANDS WOVEN INTO THE WIRE GAUZE, EACH OF THE SAID BANDS HAVING A WIDTH EQUIVALENT TO THE WIDTH NORMALLY OCCUPIED
Claim 2
Dependent Claim
51 words
A FORAMINOUS METAL DIAPHRAGM FOR LOCATING WITHIN AN ANNULAR ELECTROLYSIS ZONE OF A FUSED SALT ELECTROLYSIS CELL COMPRISING A CYLINDRICAL WIRE GAUZE STRUCTURE HAVING A PLURALITY OF CIRCULAR SPACED-APART PARALLEL REINFORCING BANDS WOVEN INTO THE WIRE GAUZE, EACH OF THE SAID BANDS HAVING A WIDTH EQUIVALENT TO THE WIDTH NORMALLY OCCUPIED
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) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |