US1444627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for scrubbing coal gas
Assignee: Research Corp
•
Filing: 1918-12-17
•
Granted: 1923-02-06
•
Expires: 1938-12-17
Abstract
No abstract record available.
Inventors
- 👤 Archibald F Meston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:58
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/16
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) | 1926-02-05 | 1926-08-07 | 1927-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-02-05 | 1930-08-07 | 1931-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-02-05 | 1934-08-07 | 1935-02-06 | $7700.00 | Window Closed / Lapsed |