US3472169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced seal for centrifugal pumps
Assignee: Canadian Vickers Ltd
•
Filing: 1967-12-27
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Granted: 1969-10-14
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Expires: 1987-12-27
Abstract
No abstract record available.
Inventors
- 👤 Stanley J Dyke
- 👤 Marcel L Tartavel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:52
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/14; F04D29/146; F16; F16J; F16J15/00; F16J15/16; F16J15/164; F16J15/34; F16J15/3436; F16J15/346
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) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |