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US2845140A
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Assignee: Individual
•
Filing: 1954-07-22
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Granted: 1958-07-29
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Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 Luhr Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:43
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/70; B01D46/74; B01D2265/00; B01D2265/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE296128C
Cited
US1806513A
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US2594957A
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US1747131A
Cited
US2255519A
Cited
GB598428A
Cited
US2507335A
Cited
DE907146C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |