Patent US3440587A successfully refreshed from Google Patents.
US3440587A
Expired / Lapsed
US
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Electrical induction apparatus construction
Assignee: Dow Silicones Corp
•
Filing: 1967-04-11
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Granted: 1969-04-22
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Expires: 1987-04-11
Abstract
No abstract record available.
Inventors
- 👤 Donald M Bartos
- 👤 Raymond J Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:21
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/14; B26B19/38; B26B19/3873; H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/323; H01F27/327; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA652037A
Cited
US961805A
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US1495823A
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US2686904A
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US2743308A
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US2914600A
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US2683767A
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US2993949A
Cited
US2951277A
Cited
US3210701A
Cited
GB970037A
Cited
US3339162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |