US3450052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication of rotary pumps intended for the delivery of liquid containing solid contaminants
Assignee: Plessey Overseas Ltd
•
Filing: 1967-05-31
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Granted: 1969-06-17
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Expires: 1987-05-31
Abstract
No abstract record available.
Inventors
- 👤 Horace G Turner
- 👤 Robert S Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:31
CPC Classifications
F; F04; F04C; F04C11/00; F04C11/005; F04C11/006; F04C15/00; F04C15/0088
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) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |