US2787526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of isotope concentration
Assignee: Individual
•
Filing: 1943-11-09
•
Granted: 1957-04-02
•
Expires: 1963-11-09
Abstract
No abstract record available.
Inventors
- 👤 Jerome S Spevack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:27
CPC Classifications
B; B01; B01D; B01D59/00; B01D59/28; B01D59/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE METHOD OF PRODUCING A SUBSTANCE CONTAINING CONCENTRATED THEREIN AN ISOTOPE OF AN ELEMENT WHICH COMPRISES EXCHANGING, AT TWO DIFFERENT TEMPERATURES STAGES, SAID ISOTOPE WITH ANOTHER ISOTOPE OF THE SAME ELEMENT BETWEEN CHEMICALLY DIFFERENT SUBSTANCES WHICH ARE PHYSICALLY SEPARABLE FROM EACH OTHER AND WHICH ARE CAPABLE OF CONTAINING EACH OF SAID ISOTOPES, AT LEAST ONE OF SAID SUB-
Claim 2
Independent Claim
58 words
THE METHOD OF PRODUCING A SUBSTANCE CONTAINING CONCENTRATED THEREIN AN ISOTOPE OF AN ELEMENT WHICH COMPRISES EXCHANGING, AT TWO DIFFERENT TEMPERATURES STAGES, SAID ISOTOPE WITH ANOTHER ISOTOPE OF THE SAME ELEMENT BETWEEN CHEMICALLY DIFFERENT SUBSTANCES WHICH ARE PHYSICALLY SEPARABLE FROM EACH OTHER AND WHICH ARE CAPABLE OF CONTAINING EACH OF SAID ISOTOPES, AT LEAST ONE OF SAID SUB-
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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |