Patent US3175256A successfully refreshed from Google Patents.
Patent US3428441A successfully refreshed from Google Patents.
US3428441A
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US
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Article coated with a composite particulate,microporous chromium coating and method of producing said article
Assignee: Kewanee Oil Co
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Filing: 1965-07-28
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Granted: 1969-02-18
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Expires: 1985-07-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Du Rose
- 👤 Karl S Willson
- 👤 Gustavo C Tejada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:45
CPC Classifications
C; C25; C25D; C25D15/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12104; Y10T428/12111; Y10T428/12118; Y10T428/12479; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE458632C
Cited
US2858256A
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US3061525A
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US3298802A
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US3268423A
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US3268308A
Cited
US3268424A
Cited
US3268307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |