US2921893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic apparatus including an improved roll
Assignee: National Steel Corp
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Filing: 1957-08-01
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Granted: 1960-01-19
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Expires: 1977-08-01
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:01
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/06; C25D7/0614; C25D7/0657
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN ELECTROLYTIC APPARATUS OF THE CLASS WHEREIN METAL STRIP IS GUIDED THROUGH A BODY OF LIQUID CONTAINING AT LEAST ONE SALT BY A SERIES OF SUITABLY ARRANGED ROLLS, THE IMPROVEMENT WHICH COMPRISES A SLEEVE COVERING AT LEAST THE MAJOR PROPORTION OF A ROLL NORMALLY CONTACTED BY THE METAL STRIP DURING OPERATION OF THE ELECTROLYTIC APPARATUS, THE SLEEVE COMPRISING AN ORGANIC POLYMERIC MATERIAL THAT IS NON-WETTABLE BY THE LIQUID.
Claim 2
Dependent Claim
68 words
IN ELECTROLYTIC APPARATUS OF THE CLASS WHEREIN METAL STRIP IS GUIDED THROUGH A BODY OF LIQUID CONTAINING AT LEAST ONE SALT BY A SERIES OF SUITABLY ARRANGED ROLLS, THE IMPROVEMENT WHICH COMPRISES A SLEEVE COVERING AT LEAST THE MAJOR PROPORTION OF A ROLL NORMALLY CONTACTED BY THE METAL STRIP DURING OPERATION OF THE ELECTROLYTIC APPARATUS, THE SLEEVE COMPRISING AN ORGANIC POLYMERIC MATERIAL THAT IS NON-WETTABLE BY THE LIQUID.
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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |