US3421585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid preflush composition and use thereof in acidizing earth formations
Assignee: Jackson Memorial Hospital
•
Filing: 1967-09-05
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Granted: 1969-01-14
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Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 Calixto F Garcia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:14
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/50; C09K8/60; C09K8/62; C09K8/72; C09K8/74; Y; Y10; Y10S; Y10S507/00; Y10S507/933
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3346047A
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US3343602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |