US3002802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier for electrically heated stylus
Assignee: US Philips Corp
•
Filing: 1959-01-21
•
Granted: 1961-10-03
•
Expires: 1979-01-21
Abstract
No abstract record available.
Inventors
- 👤 Rich John Edsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:22
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2691075A
Cited
US2644738A
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US2874233A
Cited
US2812393A
Cited
US2846526A
Cited
US2761917A
Cited
US2859402A
Cited
US2932714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |