Patent US2728577A successfully refreshed from Google Patents.
US2728577A
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Magnetic instrument mechanism head
Assignee: AMPRO CORP
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Filing: 1950-11-09
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Granted: 1955-12-27
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Expires: 1970-11-09
Abstract
No abstract record available.
Inventors
- 👤 Barany Edmund
- 👤 Harold W Bauman
- 👤 Sackter Melvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:25
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29; G11B15/60; G11B15/62; G11B5/10; G11B5/11
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |