US2672394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple styli recorder
Assignee: Individual
•
Filing: 1945-06-12
•
Granted: 1954-03-16
•
Expires: 1965-06-12
Abstract
No abstract record available.
Inventors
- 👤 Fred A Jeswine
- 👤 Malcolm C Henderson
- 👤 Kenneth K Wyckoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:39
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/64; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US385042A
Cited
US1094487A
Cited
US1109667A
Cited
US1211703A
Cited
US1345626A
Cited
US1649870A
Cited
US1551220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |