US2989445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous electrolytic surfacing of metal membranes
Assignee: LLOYD METAL Manufacturing Co Ltd
•
Filing: 1958-01-03
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Granted: 1961-06-20
•
Expires: 1978-01-03
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Lloyd
- 👤 James B C Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:38
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/022; C25D11/06; C25D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR CONTINUOUS ANODIZATION OF ONLY ONE SURFACE OF AN ALUMINUM SHEET WHICH COMPRISES PASSING AN ELONGATED ALUMINUM SHEET LONGITUDINALLY AND UNIDIRECTIONALLY THROUGH A PROCESSING ZONE, TREATING ONE SURFACE OF SAID SHEET WITH A CLEANING SOLUTION, RINSING AND WIPING SAID SURFACE, PASSING SAID SHEET THROUGH AN ANODIZING ZONE WHEREIN A SUBSTANTIAL PREDETERMINED AREA OF SAID ONE SURFACE IS CONTACTED WITH A FLOWING ANODIZING ELECTROLYTE TO FORM AN INTERFACE THEREON, CONTACTING THE OTHER SURFACE OF SAID SHEET WITH AN ELECTRODE DISPOSED IN SUBSTANTIALLY OPPOSED AND COEXTENDING RELATION TO SAID INTERFACE, PASSING AN ELECTRIC CURRENT OF UNIFORM DENSITY THROUGH SAID INTERFACE BY MEANS OF THE ELECTROLYTE AND ELECTRODE TO ANODIZE THE ONE SURFACE OF SAID SHEET, REMOVING THE ELECTROLYTE FROM SAID SHEET AFTER ANODIZATION, AND SEALING THE ANODIC COATING FORMED ON SAID SURFACE.
Claim 2
Dependent Claim
132 words
A PROCESS FOR CONTINUOUS ANODIZATION OF ONLY ONE SURFACE OF AN ALUMINUM SHEET WHICH COMPRISES PASSING AN ELONGATED ALUMINUM SHEET LONGITUDINALLY AND UNIDIRECTIONALLY THROUGH A PROCESSING ZONE, TREATING ONE SURFACE OF SAID SHEET WITH A CLEANING SOLUTION, RINSING AND WIPING SAID SURFACE, PASSING SAID SHEET THROUGH AN ANODIZING ZONE WHEREIN A SUBSTANTIAL PREDETERMINED AREA OF SAID ONE SURFACE IS CONTACTED WITH A FLOWING ANODIZING ELECTROLYTE TO FORM AN INTERFACE THEREON, CONTACTING THE OTHER SURFACE OF SAID SHEET WITH AN ELECTRODE DISPOSED IN SUBSTANTIALLY OPPOSED AND COEXTENDING RELATION TO SAID INTERFACE, PASSING AN ELECTRIC CURRENT OF UNIFORM DENSITY THROUGH SAID INTERFACE BY MEANS OF THE ELECTROLYTE AND ELECTRODE TO ANODIZE THE ONE SURFACE OF SAID SHEET, REMOVING THE ELECTROLYTE FROM SAID SHEET AFTER ANODIZATION, AND SEALING THE ANODIC COATING FORMED ON SAID SURFACE.
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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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |