US3378480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for clamping and tightening diaphragms in filter press type cells for the electrolysis of aqueous hydrochloric acid
Assignee: Hoechst AG
•
Filing: 1965-07-29
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Granted: 1968-04-16
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Expires: 1985-07-29
Abstract
No abstract record available.
Inventors
- 👤 Reinshagen Paul
- 👤 Schmidt Heinz
- 👤 Ziemer Waldemar
- 👤 Henkel Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:57
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/70; C25B9/73; C25B9/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR CLAMPING AND TIGHTENING DIAPHRAGMS IN FILTER PRESS TYPE CELLS FOR THE ELECTROLYSIS OF AQUEOUS HYDROCHLORIC ACID, WHICH COMPRISES INSERTING THE DIAPHRAGM INTO A GROOVE OF THE ELECTRODE FRAME AND CLAMPING IT WITH A V-LEDGE, THEN INSERTING AN ENDLESS PACKING CORD INTO THE GROOVE AND PRESSING IT AGAINST THE FRAME OF THE NEIGHBORING ELECTRODE.
Claim 2
Dependent Claim
56 words
A PROCESS FOR CLAMPING AND TIGHTENING DIAPHRAGMS IN FILTER PRESS TYPE CELLS FOR THE ELECTROLYSIS OF AQUEOUS HYDROCHLORIC ACID, WHICH COMPRISES INSERTING THE DIAPHRAGM INTO A GROOVE OF THE ELECTRODE FRAME AND CLAMPING IT WITH A V-LEDGE, THEN INSERTING AN ENDLESS PACKING CORD INTO THE GROOVE AND PRESSING IT AGAINST THE FRAME OF THE NEIGHBORING ELECTRODE.
References Cited (Backward Citations)
US2983656A
Cited
US3333706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |