US2680860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming hollow articles
Assignee: National Machinery Co
•
Filing: 1949-05-03
•
Granted: 1954-06-15
•
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
2026-11-01 08:52
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/08; B21J13/14; B21K; B21K1/00; B21K1/44; B21K1/46; B21K1/463
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2305049A
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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) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |