Patent US2915979A successfully refreshed from Google Patents.
US2915979A
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US
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Grit and corrosion seal for universal joints in pumps having eccentrically moving rotors
Assignee: Robbins and Myers Inc
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Filing: 1956-11-23
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Granted: 1959-12-08
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Expires: 1976-11-23
Abstract
No abstract record available.
Inventors
- 👤 Bourke John David
- 👤 Strawder A Comer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:43
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0034; F04C15/0038; F04C15/0057; F04C15/0076
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2636444A
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US2686618A
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US2695694A
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US2695565A
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US2773453A
Cited
US2759427A
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US2693764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |