US3796545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preparing elemental carbon enriched in carbon-13
Assignee: Individual
•
Filing: 1972-02-23
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Granted: 1974-03-12
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Expires: 1992-02-23
Abstract
Abstract Apparatus for use in preparing elemental carbon comprising a tubular member having an apertured wall portion separating the member into first and second chambers with means disposed on said apertured wall portion to facilitate passage of a fluid released from first chamber into second chamber and impede return of the fluid to the first chamber.
Inventors
- 👤 J Liner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:06
CPC Classifications
C; C10; C10B; C10B57/00; G; G21; G21G; G21G1/00; G21G1/001; G21G2001/0094
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
The device of claim 1 wherein said conduit extends about 40 mm into said second chamber and the radius of the arc of the U-shaped portion of the conduit is about 10 mm.
Claim 2
Dependent Claim
35 words
The device of claim 1 wherein a sintered glass wall portion is disposed intermediate said apertured wall portion and first chamber, with pores therein of size of from about 90 microns to about 200 microns.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |