US3475634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submergible oil-filled electric motor with a protecting unit for the drive of a submergible well pump
Assignee: Individual
•
Filing: 1967-08-17
•
Granted: 1969-10-28
•
Expires: 1987-08-17
Abstract
No abstract record available.
Inventors
- 👤 Alexandr Antonovich Bogdanov
- 👤 Zinaida Serafimovna Pomezkova
- 👤 Valentina Vasilievna Petrova
- 👤 Vasily Anatolievich Zhilenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:24
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132
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) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |