Patent US1453754A successfully refreshed from Google Patents.
US1453754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for gas purification
Assignee: Individual
•
Filing: 1923-03-03
•
Granted: 1923-05-01
•
Expires: 1943-03-03
Abstract
No abstract record available.
Inventors
- 👤 Cox Kenneth
- 👤 Kerr Robert Price
- 👤 Baty Ernest Jocelyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:05
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/046
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) | 1926-04-30 | 1926-10-30 | 1927-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-04-30 | 1930-10-30 | 1931-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-04-30 | 1934-10-30 | 1935-05-01 | $7700.00 | Window Closed / Lapsed |