US2536610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen purification system
Assignee: Individual
•
Filing: 1945-05-22
•
Granted: 1951-01-02
•
Expires: 1965-05-22
Abstract
No abstract record available.
Inventors
- 👤 King L D Percival
- 👤 Charles P Baker
- 👤 Raemer E Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:36
CPC Classifications
C; C01; C01B; C01B4/00; C01B3/00; C01B3/50; C01B3/501; C01B2203/00; C01B2203/04; C01B2203/0405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1174631A
Cited
US1751715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |