Patent US2245812A successfully refreshed from Google Patents.
US2245812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weatherproofing structure
Assignee: Chicago Railway Equipment Co
•
Filing: 1940-06-07
•
Granted: 1941-06-17
•
Expires: 1960-06-07
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Osner
- 👤 Edwin G Busse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:38
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/003; B61D19/005; Y; Y10; Y10S; Y10S220/00; Y10S220/03
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) | 1944-06-16 | 1944-12-16 | 1945-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-16 | 1948-12-16 | 1949-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-16 | 1952-12-16 | 1953-06-17 | $7700.00 | Window Closed / Lapsed |