US2909209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making helical electric resistance heating wire coils and provided with a rotary mandrel and a pressing roll having an elastically deformable coil embracing surface
Assignee: Driver Harris Co
•
Filing: 1954-05-24
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Granted: 1959-10-20
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Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Ciccone Patsy
- 👤 Wallin William Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:10
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/02; H01K3/04; B; B21; B21F; B21F3/00; B21F3/02; B21F3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1953502A
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GB514247A
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US2227602A
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US2260053A
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US2404424A
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US2584154A
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US2672835A
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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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |