US2970699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1956-12-24
•
Granted: 1961-02-07
•
Expires: 1976-12-24
Abstract
No abstract record available.
Inventors
- 👤 Edward G Leuthesser
- 👤 Edmund P Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:58
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D2201/00; B01D2201/12; B01D2201/127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2395449A
Cited
US2457958A
Cited
GB614684A
Cited
US2627350A
Cited
FR1045264A
Cited
US2642188A
Cited
US2730241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |