US3453460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear induction motors
Assignee: Pilkington Group Ltd
•
Filing: 1966-06-20
•
Granted: 1969-07-01
•
Expires: 1986-06-20
Abstract
No abstract record available.
Inventors
- 👤 Kenneth James Butler
- 👤 Robin Arnold Merryweather
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:06
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/18; H; H02; H02K; H02K44/00; H02K44/02; H02K44/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3173248A
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US3163838A
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US3333123A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |