US2965119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping system delivering fluid at a controlled rate
Assignee: Shell USA Inc
•
Filing: 1958-08-25
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Granted: 1960-12-20
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Expires: 1978-08-25
Abstract
No abstract record available.
Inventors
- 👤 Donald R Hawkinson
- 👤 Sherman Z Dushkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:28
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/132; B; B05; B05B; B05B12/00; B05B12/14; B05B12/1418; B05B7/00; B05B7/24; B05B7/26; B05B7/28; B05B7/32; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2582; Y10T137/2605; Y10T137/2612; Y10T137/8593; Y10T137/85954; Y10T137/85978; Y10T137/86131
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |