US2419993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping mechanism
Assignee: ENGINEERING LAB Inc
•
Filing: 1945-01-22
•
Granted: 1947-05-06
•
Expires: 1965-01-22
Abstract
No abstract record available.
Inventors
- 👤 William G Green
- 👤 Callahan Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:03
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/12; F04B9/1207; F04B9/1222; F01; F01L; F01L23/00; F01L25/00; F01L25/08; F04B43/00; F04B43/02; F04B43/06; F04B43/073; F04B43/0736; Y; Y10; Y10S; Y10S417/00; Y10S417/90
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) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |