US2464032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stylus construction and method
Assignee: Dictaphone Corp
•
Filing: 1945-03-19
•
Granted: 1949-03-08
•
Expires: 1965-03-19
Abstract
No abstract record available.
Inventors
- 👤 Franz Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:43
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/44; G11B3/46; G11B3/48; Y; Y10; Y10S; Y10S451/00; Y10S451/913; Y10S451/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR741015A
Cited
US902598A
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US1110428A
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US1409630A
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US1373635A
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US1817094A
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US2187512A
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US2239456A
Cited
US2307407A
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US2384253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |