Patent US2448435A successfully refreshed from Google Patents.
US2448435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper file
Assignee: Art Metal Construction Co
•
Filing: 1944-08-11
•
Granted: 1948-08-31
•
Expires: 1964-08-11
Abstract
No abstract record available.
Inventors
- 👤 Johnson John Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:08
CPC Classifications
B; B42; B42F; B42F19/00; Y; Y10; Y10T; Y10T24/00; Y10T24/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1310468A
Cited
US1489007A
Cited
US1481821A
Cited
US1756853A
Cited
US1856388A
Cited
US1868332A
Cited
US1936546A
Cited
US1955592A
Cited
US1977667A
Cited
DE681972C
Cited
US2137826A
Cited
US2217018A
Cited
GB544115A
Cited
US2360840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |