US2533399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure seal for rotary pumps and the like
Assignee: HYPRO ENGINEERING Co
•
Filing: 1947-12-05
•
Granted: 1950-12-12
•
Expires: 1967-12-05
Abstract
No abstract record available.
Inventors
- 👤 Harry J Sadler
- 👤 Ernest E Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:02
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0023; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/106; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR464475A
Cited
GB289365A
Cited
US2021346A
Cited
US2171968A
Cited
US2144691A
Cited
US2367882A
Cited
US2403796A
Cited
US2373443A
Cited
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 |