US3269130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of gaseous mixtures containing hydrogen and nitrogen
Assignee: Air Products and Chemicals Inc
•
Filing: 1957-01-04
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Granted: 1966-08-30
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Expires: 1977-01-04
Abstract
No abstract record available.
Inventors
- 👤 Joe L Cost
- 👤 Jr Lee S Gaumer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:28
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04521; F25J3/04563; F25J3/04587; F25J3/0204; F25J3/0219; F25J3/0223; F25J3/0228; F25J3/0276; F25J3/04006; F25J3/04078; F25J3/0409; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04296; F25J3/04406; F25J3/04412; F25J3/04612; F25J2200/00; F25J2200/50; F25J2200/52; F25J2205/00; F25J2205/02; F25J2205/04; F25J2205/30; F25J2210/00; F25J2210/12; F25J2210/14; F25J2270/00; F25J2270/42; Y; Y10; Y10S; Y10S62/00; Y10S62/931; Y10S62/934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |