Patent US5635760A successfully refreshed from Google Patents.
Patent CA505651A successfully refreshed from Google Patents.
Patent US1767628A successfully refreshed from Google Patents.
US1767628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-washing apparatus
Assignee: Brassert & Co
•
Filing: 1927-02-07
•
Granted: 1930-06-24
•
Expires: 1947-02-07
Abstract
No abstract record available.
Inventors
- 👤 Maltitz Edmund Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:12
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/16
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) | 1933-06-23 | 1933-12-23 | 1934-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-23 | 1937-12-23 | 1938-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-23 | 1941-12-23 | 1942-06-24 | $7700.00 | Window Closed / Lapsed |