Patent US2669278A successfully refreshed from Google Patents.
US2669278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube corrugating machine
Assignee: CHICAGO METAL HOSE Corp
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Filing: 1948-03-06
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Granted: 1954-02-16
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Expires: 1968-03-06
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:27
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04; B21D15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1605194A
Cited
US1750784A
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US1982369A
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US1810342A
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US2027018A
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US2092873A
Cited
US2486830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |