US3042839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct-voltage monitoring circuit
Assignee: US Philips Corp
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Filing: 1959-10-29
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Granted: 1962-07-03
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Expires: 1979-10-29
Abstract
No abstract record available.
Inventors
- 👤 Hermes Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/04; G; G01; G01F; G01F23/00; G01F23/0007; H02; H02H; H02H3/00; H02H3/20; H02H3/202; H04; H04B; H04B3/00; H04B3/02; H04B3/44; H04B3/46; H04M; H04M19/00; H04M19/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |