Patent US3429513A successfully refreshed from Google Patents.
US3429513A
Expired / Lapsed
US
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Combination agitator and chopper for intake of slurry pump
Assignee: Agpro Inc
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Filing: 1966-11-14
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Granted: 1969-02-25
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Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Donald J Gribble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:20
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/2288; B; B02; B02C; B02C18/00; B02C18/0084; B02C18/0092
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |