US3516262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of gas mixtures such as methane and nitrogen mixtures
Assignee: McDonnell Douglas Corp
•
Filing: 1967-05-01
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Granted: 1970-06-23
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Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Bernstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0228; F25J3/0233; F25J3/0257; F25J5/00; F25J5/002; F25J5/007; F25J2200/00; F25J2200/80; F25J2240/00; F25J2240/02; F25J2240/12; F25J2270/00; F25J2270/04; F25J2270/06; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/903; Y10S62/927
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |