US2705191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and solution for treating aluminum
Assignee: Individual
•
Filing: 1949-10-31
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Granted: 1955-03-29
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Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 John F Jumer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:07
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
THE METHOD FOR CHEMICALLY POLISHING THE SURFACE OF ARTICLES FORMED FROM A METAL CONSISTING PRINCIPALLY OF ALUMINUM AND CONTAINING NOT MORE THAN 5 PER CENT OF SILICON WHICH COMPRISES THE STEPS OF FORMING AN AQUEOUS BATH CONTAINING 0.5-30.0 GRAMS SODIUM NITRATE AND 0.2510.0 GRAMS OF SODIUM SULFATE DISSOLVED IN 100 CC. OF 75 PER CENT PHOSPHORIC ACID, MAINTIANING THE TEMPERATURE OF THE BATH AT 150*-275* F., BRINGING THE SURFACE OF THE ALUMINUM ARTICLE TO BE POLISHED INTO CONTACT WITH THE BATH, DIPPING THE ARTICLE AFTER TREATMENT IN A NITRIC ACID BATH AND RINSING THE ARTICLE WITH WATER.
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) | 1958-03-28 | 1958-09-27 | 1959-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-28 | 1962-09-27 | 1963-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-28 | 1966-09-27 | 1967-03-29 | $7700.00 | Window Closed / Lapsed |