US3020850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dredge pump seal
Assignee: MECKUM ENGINEERING Inc
•
Filing: 1958-02-27
•
Granted: 1962-02-13
•
Expires: 1978-02-27
Abstract
No abstract record available.
Inventors
- 👤 John W Meckenstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:19
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/16; F04D29/165; F04D29/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB191215487A
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US1376043A
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US1525884A
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US2013499A
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US1967182A
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US2255239A
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US2393116A
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US2431221A
Cited
US2695246A
Cited
US2696841A
Cited
AT186127B
Cited
US2644403A
Cited
FR1081749A
Cited
US2796027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |