Patent US1489347A successfully refreshed from Google Patents.
US1489347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of iron and steel
Assignee: J P LAFFEY
•
Filing: 1920-05-01
•
Granted: 1924-04-08
•
Expires: 1940-05-01
Abstract
No abstract record available.
Inventors
- 👤 Albert W Davison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:08
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C21; C21B; C21B13/00; C22B1/14; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
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) | 1927-04-08 | 1927-10-08 | 1928-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-04-08 | 1931-10-08 | 1932-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-04-08 | 1935-10-08 | 1936-04-08 | $7700.00 | Window Closed / Lapsed |