US2455863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring coiling machine embodying a change speed mechanism
Assignee: Madison Management Group Inc
•
Filing: 1946-12-26
•
Granted: 1948-12-07
•
Expires: 1966-12-26
Abstract
No abstract record available.
Inventors
- 👤 Elmer W Halvorsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:21
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2038860A
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US2096605A
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US2135729A
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US2161894A
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US2175426A
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US2260053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-07 | 1952-06-07 | 1952-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-07 | 1956-06-07 | 1956-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-07 | 1960-06-07 | 1960-12-07 | $7700.00 | Window Closed / Lapsed |