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Patent US2429180A successfully refreshed from Google Patents.
US2429180A
Expired / Lapsed
US
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Generator or motor field structure
Assignee: PRODUCTS DEV Inc
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Filing: 1944-10-14
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Granted: 1947-10-14
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Expires: 1964-10-14
Abstract
No abstract record available.
Inventors
- 👤 Barlick Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:08
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/146; H02K1/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US571462A
Cited
US815847A
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US911364A
Cited
US1145081A
Cited
US1422145A
Cited
US1593230A
Cited
FR590670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |