US2500890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal working method and mechanism
Assignee: Individual
•
Filing: 1945-09-25
•
Granted: 1950-03-14
•
Expires: 1965-09-25
Abstract
No abstract record available.
Inventors
- 👤 Paul D Wurzburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:07
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/29; B21C37/294; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49442; Y10T29/49444
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1911653A
Cited
US1406693A
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US1946117A
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US1916645A
Cited
US2111695A
Cited
US2243809A
Cited
US2149508A
Cited
US2170853A
Cited
US2206741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |