US2960835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of gaseous mixtures
Assignee: Air Products Inc
•
Filing: 1958-06-10
•
Granted: 1960-11-22
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Expires: 1978-06-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Lee S Gaumer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:29
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/20; Y; Y10; Y10S; Y10S62/00; Y10S62/918
Claims Analysis
Total Claims: 0
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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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |