US2839370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum etching
Assignee: Hanson Van Winkle Munning Co
•
Filing: 1956-05-04
•
Granted: 1958-06-17
•
Expires: 1976-05-04
Abstract
No abstract record available.
Inventors
- 👤 Foulke Donald Gardner
- 👤 Irgens Oscar Kendle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:07
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE PROCESS FOR ETCHING ARTICLES OF ALUMINUM AND ALUMINUM BASE ALLOYS WHICH COMPRISES BATHING SAID ARTICLES IN AN AQUEOUS ALKALINE ALUMINUM ETCHING SOLUTION CONTAINING AT LEAST 0.01 OUNCE PER GALLON OF AT LEAST ONE PRIMARY CARBINOL OF THE GRUP CONSISTING OF PENTAERYTHRITOL, TETRAHYDROFURFURYL ALCOHOL, AND 1,2,4-BUTANERIOL.
Claim 2
Dependent Claim
46 words
THE PROCESS FOR ETCHING ARTICLES OF ALUMINUM AND ALUMINUM BASE ALLOYS WHICH COMPRISES BATHING SAID ARTICLES IN AN AQUEOUS ALKALINE ALUMINUM ETCHING SOLUTION CONTAINING AT LEAST 0.01 OUNCE PER GALLON OF AT LEAST ONE PRIMARY CARBINOL OF THE GRUP CONSISTING OF PENTAERYTHRITOL, TETRAHYDROFURFURYL ALCOHOL, AND 1,2,4-BUTANERIOL.
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |