US2827724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining etching depth
Assignee: Turco Products Inc
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Filing: 1955-03-07
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Granted: 1958-03-25
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Expires: 1975-03-07
Abstract
No abstract record available.
Inventors
- 👤 Richard V Edds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:08
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/02; C23F1/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A DEVICE FOR OBTAINING A PREDETERMINED DEPTH OF MATERIAL REMOVAL FROM AN ARTICLE BY CHEMICAL ETCHING IN AN ETCHING SOLUTION, WHICH COMPRISES A TAN FOR SAID SOLUTION, A SUPPORT FOR SAID ARTICLE, A CONTAINER MOUNTED IN SAID TANK ABOVE SAID SUPPORT, SAID CONTAINER HAVING AN OPENING FOR THE INTRODUCTION THERIN OF GAS GENERATED FROM SAID ARTICLE DURING ETCHING, A SUPPORT FOR SAID CONTAINER AND MEANS FOR SENSING THE QUANTITY OF GAS INTRODUCED IN SAID CONTAINER.
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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |