US2673143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing a mirrorlike finish on aluminum
Assignee: Diversey Corp USA
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Filing: 1951-03-10
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Granted: 1954-03-23
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Expires: 1971-03-10
Abstract
No abstract record available.
Inventors
- 👤 Fresne Eugene R Du
- 👤 John R Swihart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:32
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
THE METHOD OF FORMING A REFLECTING SURFACE ON ALUMINUM WHICH COMPRISES IMMERSING IT IN A CAUSTIC SODA BATH INCLUDING A SMALL PROPORTION SODIUM GLUCONATE AND A LARGE AMOUNT OF A DISSOLVED OXIDIZING AGENT.
Claim 2
Independent Claim
33 words
THE METHOD OF FORMING A REFLECTING SURFACE ON ALUMINUM WHICH COMPRISES IMMERSING IT IN A CAUSTIC SODA BATH INCLUDING A SMALL PROPORTION SODIUM GLUCONATE AND A LARGE AMOUNT OF A DISSOLVED OXIDIZING AGENT.
References Cited (Backward Citations)
US2168909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |