US2853372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and process for the controlled etching of aluminum and aluminum alloys
Assignee: KELITE PRODUCTS Inc
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Filing: 1954-11-22
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Granted: 1958-09-23
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Expires: 1974-11-22
Abstract
No abstract record available.
Inventors
- 👤 Mcdonald Louis
- 👤 Dariel E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:35
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN A PROCESS OF ETCHING ALUMINUM AND ALUMINUM ALLOYS THE STEP, COMMPRISING: TREATING THE SURFACE TO BE ETCHED WITH A HOT AQUEOUS SOLUTION OF ANETCHING ALKALI CONTAINING A SMALL AMOUNT OF A LOWER ALKYL NAPHTHALENE SULFORNATE SELECTED FROM TH ECLASS CONSISTING OF (A) COMPOUNDS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
48 words
IN A PROCESS OF ETCHING ALUMINUM AND ALUMINUM ALLOYS THE STEP, COMMPRISING: TREATING THE SURFACE TO BE ETCHED WITH A HOT AQUEOUS SOLUTION OF ANETCHING ALKALI CONTAINING A SMALL AMOUNT OF A LOWER ALKYL NAPHTHALENE SULFORNATE SELECTED FROM TH ECLASS CONSISTING OF (A) COMPOUNDS HAVING THE GENERAL FORMULA
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |