US2942954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-hazardous etching solutions
Assignee: Motors Liquidation Co
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Filing: 1955-10-20
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Granted: 1960-06-28
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Expires: 1975-10-20
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:45
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A METHOD FOR ETCHING A TITANUIM SPECIMEN, THE STEP OF TREATING THE SPECIMEN WITH A HOT AQUEOUS ETCHING SOLUTION COMPRISING A WATER SOLUBLE PERSULFATE SALT AS A SAFE YET POWERFUL OXIDIZING AGENT AND A WATER SOLUBLE FLOURIDE SALT AS A COMPLEXING AGENT CAPABLE OF FORMING A STABLE AND SOLUBLE COMPLEX WITH THE TITANUIM IONS FOR A SHORT BUT EFFECTIVE PERIOD OF TIME NECESSARY FOR OBTAINING AN ETCH OF THE DESIRED QUALITY, THE CONCENTRATION OF SAID OXIDIZATION AGENT BEING FROM ABOUT 68 GM./1. TO SATURATION AT 25*C. AND THE CONCENTRATION OF SAID COMPLEXING AGENT BEING FROM ABOUT 13 GM./1. TO SATURATION AT 25*C.
Claim 2
Dependent Claim
103 words
IN A METHOD FOR ETCHING A TITANUIM SPECIMEN, THE STEP OF TREATING THE SPECIMEN WITH A HOT AQUEOUS ETCHING SOLUTION COMPRISING A WATER SOLUBLE PERSULFATE SALT AS A SAFE YET POWERFUL OXIDIZING AGENT AND A WATER SOLUBLE FLOURIDE SALT AS A COMPLEXING AGENT CAPABLE OF FORMING A STABLE AND SOLUBLE COMPLEX WITH THE TITANUIM IONS FOR A SHORT BUT EFFECTIVE PERIOD OF TIME NECESSARY FOR OBTAINING AN ETCH OF THE DESIRED QUALITY, THE CONCENTRATION OF SAID OXIDIZATION AGENT BEING FROM ABOUT 68 GM./1. TO SATURATION AT 25*C. AND THE CONCENTRATION OF SAID COMPLEXING AGENT BEING FROM ABOUT 13 GM./1. TO SATURATION AT 25*C.
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |