US3363577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft sealing for spinning pump
Assignee: Akzona Inc
•
Filing: 1965-09-02
•
Granted: 1968-01-16
•
Expires: 1985-09-02
Abstract
No abstract record available.
Inventors
- 👤 Heijnis James Watt Ijsbrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:53
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0034; F04C15/0038; F04C15/0023; F04C15/0057; F04C15/0061; F04C15/0088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1597411A
Cited
US2096870A
Cited
US2316565A
Cited
US2420622A
Cited
US2391577A
Cited
US2967487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |