US3528502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterflood process using phosphated hydroxyamines as scale inhibitors
Assignee: ChampionX LLC
•
Filing: 1968-11-25
•
Granted: 1970-09-15
•
Expires: 1988-11-25
Abstract
No abstract record available.
Inventors
- 👤 Donald C Oleen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:56
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; E; E21; E21B; E21B43/00; E21B43/16; E21B43/20; Y; Y10; Y10S; Y10S507/00; Y10S507/92; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2429593A
Cited
US2470831A
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US2470830A
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US2777818A
Cited
US3258071A
Cited
US3191676A
Cited
US3288217A
Cited
US3477956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |