Patent US3425876A successfully refreshed from Google Patents.
US3425876A
Expired / Lapsed
US
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Phosphate coating process
Assignee: Henkel Corp
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Filing: 1967-10-17
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Granted: 1969-02-04
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Expires: 1987-10-17
Abstract
No abstract record available.
Inventors
- 👤 Lester Steinbrecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:31
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/78; C23C22/80; C23C22/05; C23C22/06; C23C22/34; C23C22/36; C23C22/362
Claims Analysis
Total Claims: 0
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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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |