US2668656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sylphon sealed pump
Assignee: Individual
•
Filing: 1944-12-19
•
Granted: 1954-02-09
•
Expires: 1964-12-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Eugene T Booth
- 👤 Hugh C Paxton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:16
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/008; F04B39/00; F04B39/0005; F04B39/04; F04B39/041; F04B39/047; F04B5/00; F04B5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US500720A
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US611455A
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US1239869A
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US1527545A
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US1546397A
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US1489912A
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US1670799A
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US1757997A
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US1923519A
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US1931833A
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GB475326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |