Patent US2667650A successfully refreshed from Google Patents.
US2667650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making hollow articles
Assignee: National Machinery Co
•
Filing: 1949-05-03
•
Granted: 1954-02-02
•
Expires: 1969-05-03
Abstract
No abstract record available.
Inventors
- 👤 John H Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:53
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/44; B21K1/46; B21K1/463
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US578437A
Cited
US978758A
Cited
US1168855A
Cited
US1642736A
Cited
US1978371A
Cited
US2030290A
Cited
US2093646A
Cited
US2113172A
Cited
US2125272A
Cited
US2151776A
Cited
US2202324A
Cited
US2271257A
Cited
US2261318A
Cited
US2261066A
Cited
US2287214A
Cited
US2396995A
Cited
US2417569A
Cited
US2583270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |