US2570435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic vapor phase fluorination apparatus
Assignee: Individual
•
Filing: 1945-03-30
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Granted: 1951-10-09
•
Expires: 1965-03-30
Abstract
No abstract record available.
Inventors
- 👤 Frederick B Downing
- 👤 John B Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:49
CPC Classifications
B; B01; B01J; B01J4/00; B01J4/04; B01J12/00; B01J12/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A REACTOR FOR MULTI-COMPONENT VAPOR PHASE CONTACT REACTIONS, WHICH COMPRISES A REACTION CHAMBER ADAPTED TO CONTAIN A PERMEABLE BODY OF CONTACT ELEMENTS, A PAIR OF REAGENT INLETS AT ONE END, AN OUTLET FOR REACTION PRODUCTS AT THE OTHER END, AND A BARRIER BETWEEN SAID PAIR OF
Claim 2
Dependent Claim
46 words
A REACTOR FOR MULTI-COMPONENT VAPOR PHASE CONTACT REACTIONS, WHICH COMPRISES A REACTION CHAMBER ADAPTED TO CONTAIN A PERMEABLE BODY OF CONTACT ELEMENTS, A PAIR OF REAGENT INLETS AT ONE END, AN OUTLET FOR REACTION PRODUCTS AT THE OTHER END, AND A BARRIER BETWEEN SAID PAIR OF
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |