US2517508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-position bench sifter
Assignee: Individual
•
Filing: 1946-04-09
•
Granted: 1950-08-01
•
Expires: 1966-04-09
Abstract
No abstract record available.
Inventors
- 👤 Carl A Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:59
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/50; B07B1/52; B07B1/522; B07B1/524
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US162367A
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US338582A
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US572242A
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US681823A
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US896230A
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US928965A
Cited
US1123091A
Cited
GB191416882A
Cited
US1430443A
Cited
US1421809A
Cited
US1863291A
Cited
GB430137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-31 | 1954-01-30 | 1954-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-31 | 1958-01-30 | 1958-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-31 | 1962-01-30 | 1962-08-01 | $7700.00 | Window Closed / Lapsed |