US2687693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sump pump
Assignee: Tokheim Corp
•
Filing: 1949-12-27
•
Granted: 1954-08-31
•
Expires: 1969-12-27
Abstract
No abstract record available.
Inventors
- 👤 William L Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:01
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/02; F04D15/0209; F04D15/0218
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1698693A
Cited
US1289429A
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US1654760A
Cited
US1784205A
Cited
US1744684A
Cited
US2246940A
Cited
US2222595A
Cited
US2424657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |