US3414510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for selectively removing chromates
Assignee: ChampionX LLC
•
Filing: 1968-02-29
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Granted: 1968-12-03
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Expires: 1988-02-29
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Oberbofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:08
CPC Classifications
C; C01; C01G; C01G37/00; C01G37/003; B; B01; B01J; B01J41/00; B01J41/04; B01J41/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3147214A
Cited
US3223620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |