US2633539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for separating particles of different masses
Assignee: Individual
•
Filing: 1948-01-14
•
Granted: 1953-03-31
•
Expires: 1968-01-14
Abstract
No abstract record available.
Inventors
- 👤 Altar William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/34; H01J49/40; H01J49/004; H01J49/28; H01J49/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2009457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |