US3500651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high pressure gaseous oxygen by low temperature rectification of air
Assignee: Linde GmbH
•
Filing: 1967-01-13
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Granted: 1970-03-17
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Expires: 1987-01-13
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:26
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04333; F25J3/04351; F25J3/04006; F25J3/04078; F25J3/0409; F25J3/04151; F25J3/04187; F25J3/04218; F25J3/04224; F25J3/04284; F25J3/04309; F25J3/04315; F25J3/044; F25J3/04406; F25J3/04412; F25J2200/00; F25J2200/20; F25J2200/70; F25J2205/00; F25J2205/24; F25J2230/00; F25J2230/42; F25J2245/00; F25J2245/42; F25J2250/00; F25J2250/20
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) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |