US3448034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid stabilizer
Assignee: Hydro Petro Technology Inc
•
Filing: 1966-08-24
•
Granted: 1969-06-03
•
Expires: 1986-08-24
Abstract
No abstract record available.
Inventors
- 👤 Leonard F Craft
- 👤 Frank E Calvery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:21
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; C; C22; C22C; C22C9/00; C22C9/04; C22C9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US851159A
Cited
US1608709A
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US2392033A
Cited
US2401546A
Cited
US2805988A
Cited
US2846385A
Cited
US2829099A
Cited
US3137642A
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 |