US2493473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool mechanism
Assignee: Dual Manufacturing and Engineering Inc
•
Filing: 1948-04-08
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Granted: 1950-01-03
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Expires: 1968-04-08
Abstract
No abstract record available.
Inventors
- 👤 Louis J Bouchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:32
CPC Classifications
B; B23; B23C; B23C1/00; B23C1/02; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30448
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |