US3134643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the concentration of isotopes of nitrogen and oxygen in nitric oxide
Assignee: BASF Schweiz AG
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Filing: 1958-04-14
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Granted: 1964-05-26
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Expires: 1978-04-14
Abstract
No abstract record available.
Inventors
- 👤 Clusius Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:44
CPC Classifications
B; B01; B01D; B01D59/00; B01D59/50; B01D59/02; B01D59/04; B01D59/28; B01D59/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A PROCESS FOR THE CONCENTRATION AND SEPARATION OF THE HEAVY NITROGEN ISOTOPE 15N BY ENRICHING A COMPOUND OF NITROGEN AND OXYGEN IN THE HEAVY ISOTOPIC MOLECULES THEREOF AND SUBSEQUENT RECOVERY OF THE HEAVY NITROGEN ISOTOPE THEREFROM, THE IMPROVEMENT WHICH COMPRISES CONDENSING WITH LIQUID AIR NITRIC OXIDE HAVING A LOW CONTENT OF 15NO, RECTIFYING SAID NITRIC OXIDE AT A PRESSURE OF ABOUT 210 MM. OF MERCURY AND AT A TEMPERATURE OF ABOUT 111.3* ABSOLUTE, AND SEPARATELY COLLECTING A FRACTION HAVING AN INCREASED CONTENT OF 15NO.
Claim 2
Dependent Claim
85 words
IN A PROCESS FOR THE CONCENTRATION AND SEPARATION OF THE HEAVY NITROGEN ISOTOPE 15N BY ENRICHING A COMPOUND OF NITROGEN AND OXYGEN IN THE HEAVY ISOTOPIC MOLECULES THEREOF AND SUBSEQUENT RECOVERY OF THE HEAVY NITROGEN ISOTOPE THEREFROM, THE IMPROVEMENT WHICH COMPRISES CONDENSING WITH LIQUID AIR NITRIC OXIDE HAVING A LOW CONTENT OF 15NO, RECTIFYING SAID NITRIC OXIDE AT A PRESSURE OF ABOUT 210 MM. OF MERCURY AND AT A TEMPERATURE OF ABOUT 111.3* ABSOLUTE, AND SEPARATELY COLLECTING A FRACTION HAVING AN INCREASED CONTENT OF 15NO.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |