Patent US2060940A successfully refreshed from Google Patents.
US2060940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining krypton and xenon
Assignee: Union Carbide Corp
•
Filing: 1934-05-09
•
Granted: 1936-11-17
•
Expires: 1954-05-09
Abstract
No abstract record available.
Inventors
- 👤 Kahle Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04763; F25J3/04769; F25J3/04812; F25J3/04842; F25J3/04406; F25J3/04412; F25J3/04624; F25J3/04642; F25J3/04745; F25J2200/00; F25J2200/04; F25J2200/34; F25J2200/50; F25J2200/52; F25J2205/00; F25J2205/60; F25J2205/82; F25J2245/00; F25J2245/02; F25J2250/00; F25J2250/30; F25J2250/50; F25J2290/00; F25J2290/12; Y; Y10; Y10S; Y10S62/00; Y10S62/923; Y10S62/925
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) | 1939-11-17 | 1940-05-18 | 1940-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-11-17 | 1944-05-18 | 1944-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-11-17 | 1948-05-18 | 1948-11-17 | $7700.00 | Window Closed / Lapsed |