Patent US2550388A successfully refreshed from Google Patents.
US2550388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of aluminum and aluminum alloys
Assignee: Lockheed Martin Corp
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Filing: 1945-05-12
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Granted: 1951-04-24
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Expires: 1965-05-12
Abstract
No abstract record available.
Inventors
- 👤 Simon Eli
- 👤 Frederic M Carasso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:06
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN ELOCTROLYTE FOR THE ANODIC OXIDATION OF ALUMINUM AND ALLOYS THEREOF TO PRODUCE AN ABSORBENT COATING, SAID ELECTROLYTE COMPRISING AN AQUEOUS SOLUTION CONTAINING FROM 10% TO 20% BY VOLUME OF SULFURIC ACID, AND APPROXIMATELY 0.1% BY VOLUME OF A NON-IONIC WETTING AGENT CONSISTING OF ISO OCTYL SPECIES OF ALKYLATED PHENOXY POLYETHOXY ETHANOLS.
Claim 2
Dependent Claim
52 words
AN ELOCTROLYTE FOR THE ANODIC OXIDATION OF ALUMINUM AND ALLOYS THEREOF TO PRODUCE AN ABSORBENT COATING, SAID ELECTROLYTE COMPRISING AN AQUEOUS SOLUTION CONTAINING FROM 10% TO 20% BY VOLUME OF SULFURIC ACID, AND APPROXIMATELY 0.1% BY VOLUME OF A NON-IONIC WETTING AGENT CONSISTING OF ISO OCTYL SPECIES OF ALKYLATED PHENOXY POLYETHOXY ETHANOLS.
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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |