Patent US3045749A successfully refreshed from Google Patents.
US3045749A
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Pivoting means and method for producing pulsating wave by and on fluid pressure drives
Assignee: N A HARDIN
•
Filing: 1954-06-02
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Granted: 1962-07-24
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Expires: 1974-06-02
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Brandon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:38
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/003; E21B28/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US873056A
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US1530221A
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US1658697A
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US2382685A
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US2667932A
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US2680485A
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US2670801A
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US2554005A
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US2753940A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |