Patent US2550653A successfully refreshed from Google Patents.
US2550653A
Expired / Lapsed
US
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Metal powder feed mechanism
Assignee: Individual
•
Filing: 1946-09-19
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Granted: 1951-04-24
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Expires: 1966-09-19
Abstract
No abstract record available.
Inventors
- 👤 John A Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:16
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US593267A
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US1949433A
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US1982763A
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US2054476A
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US2127994A
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US2133027A
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US2259465A
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US2206000A
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US2435858A
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US2448277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |