US3393642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable speed pumping system
Assignee: Caterpillar Global Mining LLC
•
Filing: 1966-08-31
•
Granted: 1968-07-23
•
Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 Kenneth S Kordik
- 👤 Dean R Zaumseil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:32
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734458A
Cited
US2439239A
Cited
US3021789A
Cited
US3280928A
Cited
US3290574A
Cited
US3213795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |