US2837032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for use with periodic suction pumps
Assignee: Individual
•
Filing: 1957-07-31
•
Granted: 1958-06-03
•
Expires: 1977-07-31
Abstract
No abstract record available.
Inventors
- 👤 Sr William F Horsting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:06
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; E21B43/082
Claims Analysis
Total Claims: 0
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US2668624A
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US2646126A
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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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |