US1922416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas absorbent
Assignee: Individual
•
Filing: 1931-08-05
•
Granted: 1933-08-15
•
Expires: 1951-08-05
Abstract
No abstract record available.
Inventors
- 👤 Block David Julian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:05
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; A; A45; A45D; A45D20/00; A45D20/22; A45D20/28; B01J; B01J20/00; B01J20/02; B01J20/20; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/90; B01D2259/00; B01D2259/40; B01D2259/40083
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) | 1936-08-14 | 1937-02-13 | 1937-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-14 | 1941-02-13 | 1941-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-14 | 1945-02-13 | 1945-08-15 | $7700.00 | Window Closed / Lapsed |