US2817002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of metal articles
Assignee: Research Corp
•
Filing: 1954-02-02
•
Granted: 1957-12-17
•
Expires: 1974-02-02
Abstract
No abstract record available.
Inventors
- 👤 Walter P Dyke
- 👤 Trolau J Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:05
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/022; H01J9/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US883303A
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US1017648A
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DE391089C
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US1578045A
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US1616431A
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US2121615A
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US2217448A
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US2587792A
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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) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |