US3531409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid solutions of corrosion inhibitors for use in treating oil wells
Assignee: Baker Petrolite LLC
•
Filing: 1967-01-06
•
Granted: 1970-09-29
•
Expires: 1987-01-06
Abstract
No abstract record available.
Inventors
- 👤 William E Seffens
- 👤 James B Jochens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:31
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/145; C09; C09K; C09K8/00; C09K8/54; C23F11/149; E; E21; E21B; E21B41/00; E21B41/02; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 0
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US3262791A
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US3275552A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |