US2315424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen purification
Assignee: MW Kellogg Co
•
Filing: 1941-07-17
•
Granted: 1943-03-30
•
Expires: 1961-07-17
Abstract
No abstract record available.
Inventors
- 👤 Luther R Hill
- 👤 Gregory A Vincent
- 👤 Everett W Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:13
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/06; F25J3/063; F25J3/0655; C; C01; C01B; C01B3/00; C01B3/50; C01B3/506; F25J3/08; C01B2203/00; C01B2203/04; C01B2203/0465; C01B2203/048; F25J2215/00; F25J2215/10; F25J2270/00; F25J2270/04; Y; Y10; Y10S; Y10S62/00; Y10S62/931
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) | 1946-03-29 | 1946-09-28 | 1947-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-29 | 1950-09-28 | 1951-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-29 | 1954-09-28 | 1955-03-30 | $7700.00 | Window Closed / Lapsed |