US2639006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for collecting and discharging metal powders
Assignee: Individual
•
Filing: 1949-09-29
•
Granted: 1953-05-19
•
Expires: 1969-09-29
Abstract
No abstract record available.
Inventors
- 👤 Henry A Golwynne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:10
CPC Classifications
B; B22; B22F; B22F1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB221218A
Cited
US1024297A
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US1001543A
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US1037167A
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US1125032A
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US1245366A
Cited
US1233246A
Cited
US1735298A
Cited
US1954352A
Cited
US2456044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |