US3605422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature frocess for the separation of gaseous mixtures
Assignee: Air Products and Chemicals Inc
•
Filing: 1968-02-28
•
Granted: 1971-09-20
•
Expires: 1988-02-28
Abstract
Abstract Process for the separation of a gas mixture under low pressure into components by a low temperature fractionating operation including an integrated refrigeration system which increases the liquid producing capabilities of the process for producing relatively large quantities of high purity products in liquid phase without decreasing efficiency of the fractionating operation and without sacrificing purity or yield of desired products.
Inventors
- 👤 John A Pryor
- 👤 Howard C Rowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:12
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04278; F25J3/04151; F25J3/04187; F25J3/04218; F25J3/04224; F25J3/04284; F25J3/04309; F25J3/04333; F25J3/04351; F25J3/04357; F25J3/04375; F25J3/04393; F25J3/04406; F25J3/04412; F25J2200/00; F25J2200/34; F25J2205/00; F25J2205/02; F25J2215/00; F25J2215/42; F25J2215/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |