Patent US3529661A successfully refreshed from Google Patents.
US3529661A
Expired / Lapsed
US
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Rotary material processor with hollow material contacting elements
Assignee: Joy Manufacturing Co
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Filing: 1968-04-29
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Granted: 1970-09-22
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Expires: 1988-04-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas Yousch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:41
CPC Classifications
F; F28; F28D; F28D11/00; F28F; F28F5/00; F28F5/06; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/147; Y10S165/148; Y10S165/149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US790466A
Cited
US3056588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |