Patent US3035990A successfully refreshed from Google Patents.
US3035990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical blanking of aluminum sheet metal
Assignee: Collins Radio Co
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Filing: 1958-11-05
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Granted: 1962-05-22
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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
2026-11-01 15:01
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.
References Cited (Backward Citations)
US590966A
Cited
US1783663A
Cited
GB520108A
Cited
US2311623A
Cited
US2285468A
Cited
US2472304A
Cited
US2506164A
Cited
US2886420A
Cited
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 |