Patent US3391031A successfully refreshed from Google Patents.
US3391031A
Expired / Lapsed
US
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Composition and process for forming improved chromate conversion coatings on aluminum
Assignee: Henkel Corp
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Filing: 1964-11-10
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Granted: 1968-07-02
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Expires: 1984-11-10
Abstract
No abstract record available.
Inventors
- 👤 William S Russell
- 👤 Herman J Lodeesen
- 👤 Ashok J Champaneria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:46
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37; C23C22/24; C23C22/30; C23C22/40; C23C22/44
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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |