US2973095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller-stator combination for aeration machines
Assignee: Galigher Co
•
Filing: 1957-07-09
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Granted: 1961-02-28
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Expires: 1977-07-09
Abstract
No abstract record available.
Inventors
- 👤 Charles M Anderson
- 👤 Marshall J Sayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:05
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/16; B03D1/1418; B03D1/1493; B03D1/22; B03D1/24; B03D1/26; Y; Y10; Y10S; Y10S241/00; Y10S241/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |