US2968577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for polishing metals
Assignee: Vereinigte Aluminium Werke AG
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Filing: 1956-07-03
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Granted: 1961-01-17
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Expires: 1976-07-03
Abstract
No abstract record available.
Inventors
- 👤 Helling Werner
- 👤 Neunzig Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:38
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C23G1/22; B; B24; B24B; B24B1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A METHOD OF FORMING A GLOSSY SURFACE ON A SMOOTH BODY OF A SUBSTANCE BELONGING TO THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM ALLOYS, IN THE INDICATED SEQUENCE, THE STEPS OF TREATING SAID BODY WITH A PICKLING SOLUTION TO REMOVE SURFACE OXIDE; AND WET MECHANICALLY POLISHING SAID BODY WHILE THE SAME IS SUBSTANTIALLY FREE OF SAID SURFACE OXIDE, WHEREBY A GLOSSY SURFACE IS FORMED THEREON.
Claim 2
Dependent Claim
66 words
IN A METHOD OF FORMING A GLOSSY SURFACE ON A SMOOTH BODY OF A SUBSTANCE BELONGING TO THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM ALLOYS, IN THE INDICATED SEQUENCE, THE STEPS OF TREATING SAID BODY WITH A PICKLING SOLUTION TO REMOVE SURFACE OXIDE; AND WET MECHANICALLY POLISHING SAID BODY WHILE THE SAME IS SUBSTANTIALLY FREE OF SAID SURFACE OXIDE, WHEREBY A GLOSSY SURFACE IS FORMED THEREON.
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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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |