US3408942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bilge pump
Assignee: CROWELL DESIGNS Inc
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Filing: 1967-05-23
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Granted: 1968-11-05
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Expires: 1987-05-23
Abstract
Abstract 1,175,776. Electric motors; carrying conductors into casings. CROWELL DESIGNS Inc. 22 April, 1968 [23 May, 1967], No. 18859/68. Headings H2A and H2E. [Also in Division F1] In a submersible pump (see Division F1), an electric driving motor 12 in the upper portion of an air-bell 10, is supported via a resilient ring 39 by a partition wall 37. The portions 46 of the motor supply leads are stripped of their conventional insulation 47 and are sealed to the wall of the air-bell by a plastics material, e.g. an epoxy material 60.
Inventors
- 👤 William R Davenport
- 👤 Elmer T Davenport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:02
CPC Classifications
B; B63; B63B; B63B13/00; F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/08; F04D13/083; F04D13/086; F04D29/00; F04D29/06; F04D29/061; F04D29/40; F04D29/42; F04D29/426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |