US2660438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phonograph needle
Assignee: PFANSTIEHL CHEMICAL Co
•
Filing: 1948-08-03
•
Granted: 1953-11-24
•
Expires: 1968-08-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick C Holtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:58
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/16; H04R1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB350887A
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US2455913A
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US2482972A
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US2543497A
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US2438111A
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US2509356A
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US2538164A
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US2499196A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |