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US3425947A
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Method of treating metal surfaces
Assignee: Henkel Corp
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Filing: 1966-05-02
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Granted: 1969-02-04
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Expires: 1986-05-02
Abstract
No abstract record available.
Inventors
- 👤 Werner Rausch
- 👤 Gerhard Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:53
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3947; C11D3/0005; C11D3/0042; C11D3/3942; C11D7/00; C11D7/02; C11D7/04; C11D7/06; C23; C23G; C23G1/00; C23G1/14; C23G1/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3216857A
Cited
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 |