US3426899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeration apparatus
Assignee: Yeomans Brothers Co
•
Filing: 1966-07-08
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Granted: 1969-02-11
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Expires: 1986-07-08
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:32
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/14; C02F3/16; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/234; B01F23/2342; B01F23/23421; B01F23/2366; B01F35/00; B01F35/20; B01F35/21; B01F35/213; B01F35/2132; B01F35/22; B01F35/221; B01F35/2212; B01F35/2214; B01F35/22142; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/71
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) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |