Patent US3218489A successfully refreshed from Google Patents.
US3218489A
Expired / Lapsed
US
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Linear induction motor for cranes and the like
Assignee: Herbert Morris Ltd
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Filing: 1963-03-29
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Granted: 1965-11-16
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Expires: 1983-03-29
Abstract
No abstract record available.
Inventors
- 👤 Sadler Gilbert Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:01
CPC Classifications
B; B66; B66B; B66B11/00; B66B11/04; B66B11/0407; H; H02; H02K; H02K41/00; H02K41/02; H02K41/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1881015A
Cited
US1929990A
Cited
US2337430A
Cited
US2404984A
Cited
US2428570A
Cited
US2412511A
Cited
US2666879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |