US2670224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sphero-conically generated fitting
Assignee: National Cylinder Gas Co
•
Filing: 1947-02-08
•
Granted: 1954-02-23
•
Expires: 1967-02-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur R C Markl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:27
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; B21C37/292; F; F16; F16L; F16L41/00; F16L41/02; F16L41/021; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49442
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US391445A
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US396080A
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DE596289C
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US1182360A
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US1255562A
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US1989608A
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US2138199A
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US2157274A
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US2290965A
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US2280255A
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US2360359A
Cited
US2381890A
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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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |