US1939732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welded floor structure
Assignee: AO Smith Corp
•
Filing: 1930-06-23
•
Granted: 1933-12-19
•
Expires: 1950-06-23
Abstract
No abstract record available.
Inventors
- 👤 Stresau Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:12
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/36; E04D3/3605; E04B; E04B2/00; E04B2/56; E04B2/58; E04B5/00; E04B5/02; E04B5/10; E04B7/00; E04B7/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623
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) | 1936-12-18 | 1937-06-19 | 1937-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-18 | 1941-06-19 | 1941-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-18 | 1945-06-19 | 1945-12-19 | $7700.00 | Window Closed / Lapsed |