Patent US2844496A successfully refreshed from Google Patents.
US2844496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of corrosion resistant films on aluminum
Assignee: Individual
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Filing: 1957-02-25
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Granted: 1958-07-22
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Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 Newell Isaac Laird
- 👤 Walen Ernest Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:44
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A COMPOSITION OF MATTER FOR USE IN PROVIDING CORROSION RESISTANT FILMS ON ALUMINUM AND ALLOYS THEREOF CONSISTIONG ESSENTIALLY OF, IN 100 PARTS, ABOUT 5 TO 72 PARTS BY WEIGHT OF SULFAMIC ACID; ABOUT 1 T 16 PARTS BY WEIGHT OF AN ALKALI METAL FLUORIDE; ABOUT 3 TO 34 PARTS BY WEIGHT OF AN ALKALI METAL NITRATE, AND ABOUT 11 TO 80 PARTS BY WEIGHT OF A COMPOUND CHOSEN FROM THE GROUP CONSISTING OF CHROMIC ACID, ALKALI METAL CHROMATES AND ALKALI METAL DICHROMATES.
Claim 2
Dependent Claim
82 words
A COMPOSITION OF MATTER FOR USE IN PROVIDING CORROSION RESISTANT FILMS ON ALUMINUM AND ALLOYS THEREOF CONSISTIONG ESSENTIALLY OF, IN 100 PARTS, ABOUT 5 TO 72 PARTS BY WEIGHT OF SULFAMIC ACID; ABOUT 1 T 16 PARTS BY WEIGHT OF AN ALKALI METAL FLUORIDE; ABOUT 3 TO 34 PARTS BY WEIGHT OF AN ALKALI METAL NITRATE, AND ABOUT 11 TO 80 PARTS BY WEIGHT OF A COMPOUND CHOSEN FROM THE GROUP CONSISTING OF CHROMIC ACID, ALKALI METAL CHROMATES AND ALKALI METAL DICHROMATES.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |