US3089251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment chamber for material in a fluidized state
Assignee: Dorr Oliver Inc
•
Filing: 1959-06-04
•
Granted: 1963-05-14
•
Expires: 1979-06-04
Abstract
No abstract record available.
Inventors
- 👤 Helbig Fritz
- 👤 Walfred W Jukkola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:15
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A CONSTRICTION PLATE CONSTRUCTION HAVING GAS PASSAGE DUCTS FOR MAINTAINING A BED OF PARTICLES IN A FLUIDIZED STATE BY AN UPFLOWING STREAM OF TREATMENT GASES PASSING THROUGH SAID DUCTS, WHICH COMPRISES A PLURALITY OF CON-
Claim 2
Dependent Claim
35 words
A CONSTRICTION PLATE CONSTRUCTION HAVING GAS PASSAGE DUCTS FOR MAINTAINING A BED OF PARTICLES IN A FLUIDIZED STATE BY AN UPFLOWING STREAM OF TREATMENT GASES PASSING THROUGH SAID DUCTS, WHICH COMPRISES A PLURALITY OF CON-
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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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |