US1422414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor spider
Assignee: BURKE ELECTRIC Co
•
Filing: 1919-11-06
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Granted: 1922-07-11
•
Expires: 1939-11-06
Abstract
No abstract record available.
Inventors
- 👤 Burke James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:25
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/28; H02K1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-07-10 | 1926-01-09 | 1926-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-07-10 | 1930-01-09 | 1930-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-07-10 | 1934-01-09 | 1934-07-11 | $7700.00 | Window Closed / Lapsed |