US2502490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction and stratifying container
Assignee: United States Department of the Interior
•
Filing: 1944-05-08
•
Granted: 1950-04-04
•
Expires: 1964-05-08
Abstract
No abstract record available.
Inventors
- 👤 Andrew T Sweet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:45
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/30; C01F7/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1152693A
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US1229190A
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US1889080A
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US2000939A
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US2195273A
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US2111788A
Cited
US2356547A
Cited
US2368354A
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US2366898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |