Patent US4865606A successfully refreshed from Google Patents.
US3471016A
Expired / Lapsed
US
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Fluidised-bed apparatus
Assignee: Head Wrightson and Co Ltd
•
Filing: 1967-09-11
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Granted: 1969-10-07
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Expires: 1987-09-11
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey Frank Eveson
- 👤 Alfred Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:53
CPC Classifications
F; F23; F23K; F23K1/00; B; B03; B03B; B03B5/00; B03B5/28; B03B5/46; F23K2900/00; F23K2900/01001
Claims Analysis
Total Claims: 0
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Cited
US3268071A
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US3367501A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |