US3370435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating gaseous mixtures
Assignee: Air Products and Chemicals Inc
•
Filing: 1965-07-29
•
Granted: 1968-02-27
•
Expires: 1985-07-29
Abstract
No abstract record available.
Inventors
- 👤 John E Arregger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:29
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/08; F25J2200/00; F25J2200/02; F25J2205/00; F25J2205/02; F25J2210/00; F25J2210/42; F25J2215/00; F25J2215/42; F25J2215/44; F25J2270/00; F25J2270/42; Y; Y10; Y10S; Y10S62/00; Y10S62/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3037359A
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US3212276A
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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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |