US3469132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous motor
Assignee: Tri Tech Inc
•
Filing: 1966-05-12
•
Granted: 1969-09-23
•
Expires: 1986-05-12
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Haydon
- 👤 Edward Herbert
- 👤 William D Riggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:42
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/14; H02K21/18; H02K21/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2131436A
Cited
US2525456A
Cited
US2897384A
Cited
US3181019A
Cited
US3142774A
Cited
US3157809A
Cited
US3317766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |