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US2665334A
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Dry plate type rectifier
Assignee: Keefe & Merritt Co O
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Filing: 1951-04-09
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Granted: 1954-01-05
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Expires: 1971-04-09
Abstract
No abstract record available.
Inventors
- 👤 Maurice W Brainard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:48
CPC Classifications
H; H10; H10D; H10D99/00; H10W; H10W72/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2445805A
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US2430351A
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US2461087A
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US2550710A
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US2545863A
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GB622408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |