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Patent US3447891A successfully refreshed from Google Patents.
US3447891A
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Corrosion inhibiting process
Assignee: ChampionX LLC
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Filing: 1964-09-03
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Granted: 1969-06-03
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Expires: 1984-09-03
Abstract
No abstract record available.
Inventors
- 👤 Jack D Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:07
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/232; C10L1/233; C10L1/2335
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3078223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |