Patent US3436574A successfully refreshed from Google Patents.
US3436574A
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US
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Coil bobbin with magnetic core for dynamoelectric machines
Assignee: Midland Eng & Machinery Co
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Filing: 1966-04-25
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Granted: 1969-04-01
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Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Robert T Larsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:01
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K3/325; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/4902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1481190A
Cited
US1578870A
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US1953035A
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US1956881A
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US2644651A
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US3253794A
Cited
US3264593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |