Patent US1553644A successfully refreshed from Google Patents.
Patent US3549532A successfully refreshed from Google Patents.
US3549532A
Expired / Lapsed
US
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Weighted corrosion inhibitors
Assignee: ChampionX LLC
•
Filing: 1967-09-11
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Granted: 1970-12-22
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Expires: 1987-09-11
Abstract
No abstract record available.
Inventors
- 👤 James R Stanford
- 👤 Paul G Vogelsang Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:22
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/54; C23; C23F; C23F11/00; C23F11/08; C23F11/10; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2839465A
Cited
US2785127A
Cited
US2877185A
Cited
US3098827A
Cited
US3412024A
Cited
US3378488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |