US3021874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil winding means
Assignee: Halm Instrument Co Inc
•
Filing: 1958-06-25
•
Granted: 1962-02-20
•
Expires: 1978-06-25
Abstract
No abstract record available.
Inventors
- 👤 Floyd A Lyon
- 👤 Theodore F Aronson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:39
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/06; H01F41/071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1731183A
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US1828413A
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US2276579A
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US2453749A
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US2589503A
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US2754580A
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US2693204A
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US2856969A
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US2843159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |