US3078203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of etching ferrous alloy and composition
Assignee: Motors Liquidation Co
•
Filing: 1958-10-20
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Granted: 1963-02-19
•
Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 Boda Mitchell A La
- 👤 Charles R Wiese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:07
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE METHOD OF CHEMICALLY MACHINING A STAINLESS STEEL ALLOY PART WHICH COMPRISES IMMERSING THE STAINLESS STEEL ALLOY PART IN AN AQUEOUS SOLUTION WHICH IS AT A TEMPERATURE OF APPROXIMATELY 160* F. TO 200* F. SO AS TO UNIFORMLY REMOVE METAL FROM SAID SURFACE A PREDETERMINED CONLEAST 0.001 INCH PER MINUTE TO FORM A PREDETERMINED CONFIGURATION, SAID SOLUTION CONSISTING ESSENTIALLY OF, BY WEIGHT, APPROXIMATELY 10% TO 25% AMMONIUM BIFLUORIDE, 15% TO 50% NITRIC ACID AND 25% TO 75% WATER.
Claim 2
Independent Claim
78 words
THE METHOD OF CHEMICALLY MACHINING A STAINLESS STEEL ALLOY PART WHICH COMPRISES IMMERSING THE STAINLESS STEEL ALLOY PART IN AN AQUEOUS SOLUTION WHICH IS AT A TEMPERATURE OF APPROXIMATELY 160* F. TO 200* F. SO AS TO UNIFORMLY REMOVE METAL FROM SAID SURFACE A PREDETERMINED CONLEAST 0.001 INCH PER MINUTE TO FORM A PREDETERMINED CONFIGURATION, SAID SOLUTION CONSISTING ESSENTIALLY OF, BY WEIGHT, APPROXIMATELY 10% TO 25% AMMONIUM BIFLUORIDE, 15% TO 50% NITRIC ACID AND 25% TO 75% WATER.
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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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |