Patent US1096127A successfully refreshed from Google Patents.
Patent US2670224A successfully refreshed from Google Patents.
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
2026-10-23 13:42
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US391445A
Cited
US396080A
Cited
DE596289C
Cited
US1182360A
Cited
US1255562A
Cited
US1989608A
Cited
US2138199A
Cited
US2157274A
Cited
US2290965A
Cited
US2280255A
Cited
US2360359A
Cited
US2381890A
Cited
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 |