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Patent US2499231A successfully refreshed from Google Patents.
US2499231A
Expired / Lapsed
US
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Method of producing surface conversion coatings on zinc
Assignee: United Chromium Inc
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Filing: 1944-08-25
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Granted: 1950-02-28
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Expires: 1964-08-25
Abstract
No abstract record available.
Inventors
- 👤 Jesse E Stareck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:36
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2060192A
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US1827247A
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US1853323A
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US2021592A
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US2035380A
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DE706347C
Cited
US2313456A
Cited
US2288007A
Cited
US2433723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |