US3490246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split pressure low temperature process for the production of gases of moderate purity
Assignee: Linde GmbH
•
Filing: 1966-08-18
•
Granted: 1970-01-20
•
Expires: 1986-08-18
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:04
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04406; F25J3/04412; F25J3/04151; F25J3/04187; F25J3/04193; F25J3/04206; F25J3/04212; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04303; F25J3/04309; F25J3/04315; F25J3/044; F25J3/04436; F25J3/04448; F25J2200/00; F25J2200/32; F25J2200/70; F25J2205/00; F25J2205/24; F25J2205/30; F25J2250/00; F25J2250/30; F25J2250/42; F25J2250/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2423274A
Cited
US2664719A
Cited
US2699047A
Cited
DE894248C
Cited
US2964914A
Cited
US2918802A
Cited
US3066494A
Cited
US3214925A
Cited
US3258930A
Cited
US3261168A
Cited
US3257814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |