US2533320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary gear-type metering pump
Assignee: EIDP Inc
•
Filing: 1949-01-04
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Granted: 1950-12-12
•
Expires: 1969-01-04
Abstract
No abstract record available.
Inventors
- 👤 Hull Donald Robert
- 👤 Phillips Daniel Parker
- 👤 Tate Nelson Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:34
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/06; F04C11/00; F04C11/001; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/18
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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |