US2601419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanding mandrel
Assignee: Individual
•
Filing: 1949-11-14
•
Granted: 1952-06-24
•
Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Hilbert C Spahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:22
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/40; B23B31/404; B23B31/4046; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1037; Y10T279/1041; Y10T279/1054; Y10T279/1058
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US101134A
Cited
US581209A
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US967175A
Cited
US1231743A
Cited
US1468270A
Cited
US1813567A
Cited
US2226078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |