US2811471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytrifluorochloroethylene-coated aluminum
Assignee: Connecticut Hard Rubber Co
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Filing: 1954-05-10
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Granted: 1957-10-29
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Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry N Homeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:28
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24; B; B05; B05D; B05D5/00; B05D5/08; B05D5/083; B05D5/086; B05D2350/00; B05D2350/20; Y; Y10; Y10S; Y10S128/00; Y10S128/14; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE METHOD WHICH INCLUDES THE STEPS OF TREATING AN ALUMINUM SURFACE WITH AN AQUEOUS SOLUTION CONTAINING SULFURIC AND CHROMIC ACIDS, APPLYING A MIXTURE OF HIGH MOLECULAR WEIGHT SOLID POLYTRIFLUOROCHLOROETHYLENE AND A SIGNIFICANT AMOUNT OF WAXY POLYTRIFLUOROCHLOROETHYLENE PLASTICIZER, HEATING AND QUENCHING, THEREBY FORMING A SECURELY ADHERED FILM OF POLYTRIFIUOROCHLOROETHYLENE ON THE ALUMINUM.
Claim 2
Independent Claim
51 words
THE METHOD WHICH INCLUDES THE STEPS OF TREATING AN ALUMINUM SURFACE WITH AN AQUEOUS SOLUTION CONTAINING SULFURIC AND CHROMIC ACIDS, APPLYING A MIXTURE OF HIGH MOLECULAR WEIGHT SOLID POLYTRIFLUOROCHLOROETHYLENE AND A SIGNIFICANT AMOUNT OF WAXY POLYTRIFLUOROCHLOROETHYLENE PLASTICIZER, HEATING AND QUENCHING, THEREBY FORMING A SECURELY ADHERED FILM OF POLYTRIFIUOROCHLOROETHYLENE ON THE ALUMINUM.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |