Patent US3660291A successfully refreshed from Google Patents.
Patent US1716480A successfully refreshed from Google Patents.
US1716480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas absorber for products of combustion
Assignee: Individual
•
Filing: 1927-05-18
•
Granted: 1929-06-11
•
Expires: 1947-05-18
Abstract
No abstract record available.
Inventors
- 👤 Billings John Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:00
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; Y; Y10; Y10S; Y10S55/00; Y10S55/30
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) | 1932-06-10 | 1932-12-10 | 1933-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-06-10 | 1936-12-10 | 1937-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-06-10 | 1940-12-10 | 1941-06-11 | $7700.00 | Window Closed / Lapsed |