US3035990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical blanking of aluminum sheet metal
Assignee: Collins Radio Co
•
Filing: 1958-11-05
•
Granted: 1962-05-22
•
Expires: 1978-11-05
Abstract
No abstract record available.
Inventors
- 👤 Gareth J Davis
- 👤 Peter C Peropoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:15
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD OF ETCHING ALUMINUM PLATE COMPRISING ANODIZING THE SURFACE THEREOF, COATING SAID ANODIZED SURFACE WITH A PREDETERMINED PATTERN OF RESIST OF THE TYPE SUBSTANTIALLY CHEMICALLY INERT TO A HYDROXIDE ETCHANT, EXPOSING SAID RESULTING SURFACE TO SAID HYDROXIDE ETCHANT TO SELECTIVELY ATTACK AND REMOVE THE EXPOSED AREAS OF ANODIZED PLATE SURFACE AND FURTHER EXPOSING THE RESULTING SURFACE TO A FERRIC CHLORIDE SOLUTION BY WHICH SAID ALUMINUM IS ACTIVELY ATTACKED AND TO WHICH SAID REMAINING ANODIZED AREAS OF SAID PLATE ARE SUBSTANTIALLY CHEMICALLY INERT.
Claim 2
Independent Claim
83 words
A METHOD OF ETCHING ALUMINUM PLATE COMPRISING ANODIZING THE SURFACE THEREOF, COATING SAID ANODIZED SURFACE WITH A PREDETERMINED PATTERN OF RESIST OF THE TYPE SUBSTANTIALLY CHEMICALLY INERT TO A HYDROXIDE ETCHANT, EXPOSING SAID RESULTING SURFACE TO SAID HYDROXIDE ETCHANT TO SELECTIVELY ATTACK AND REMOVE THE EXPOSED AREAS OF ANODIZED PLATE SURFACE AND FURTHER EXPOSING THE RESULTING SURFACE TO A FERRIC CHLORIDE SOLUTION BY WHICH SAID ALUMINUM IS ACTIVELY ATTACKED AND TO WHICH SAID REMAINING ANODIZED AREAS OF SAID PLATE ARE SUBSTANTIALLY CHEMICALLY INERT.
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Cited
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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) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |