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US2830675A
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Assignee: Individual
•
Filing: 1954-12-27
•
Granted: 1958-04-15
•
Expires: 1974-12-27
Abstract
No abstract record available.
Inventors
- 👤 Drager Otto Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:51
CPC Classifications
A; A62; A62B; A62B13/00; B; B01; B01D; B01D46/00; B01D46/30; B01D46/32; Y; Y10; Y10S; Y10S454/00; Y10S454/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL28371C
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US842661A
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US945375A
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CH99514A
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US1538292A
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US2074283A
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DE864309C
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FR1041292A
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GB699337A
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US2729966A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |