Patent US2490056A successfully refreshed from Google Patents.
US2490056A
Expired / Lapsed
US
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Measuring device using a rotating trap chamber having a varying peripheral speed
Assignee: National Urn Bag Co Inc
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Filing: 1943-08-24
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Granted: 1949-12-06
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Expires: 1963-08-24
Abstract
No abstract record available.
Inventors
- 👤 Hans O Irmscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:40
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/30; B65B1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US507177A
Cited
DE81360C
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US774326A
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US890190A
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US1165508A
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US1086814A
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US2332558A
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US2339908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |