US2643614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-driven dual pumping unit
Assignee: General Electric Co
•
Filing: 1949-09-28
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Granted: 1953-06-30
•
Expires: 1969-09-28
Abstract
No abstract record available.
Inventors
- 👤 Frank A Rosenkrans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:01
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/10; H02K7/108; F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F16; F16D; F16D41/00; F16D41/22; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1527
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE526780C
Cited
US1170653A
Cited
US1563945A
Cited
US1957359A
Cited
US1991756A
Cited
US2047392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |