US2709967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling and ventilating system for generating electric locomotives
Assignee: Motors Liquidation Co
•
Filing: 1949-08-13
•
Granted: 1955-06-07
•
Expires: 1969-08-13
Abstract
No abstract record available.
Inventors
- 👤 Richard M Dilworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:15
CPC Classifications
B; B61; B61C; B61C5/00; B61C5/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1987456A
Cited
US1708558A
Cited
US1804334A
Cited
US2009823A
Cited
US2230580A
Cited
US2170791A
Cited
US2205266A
Cited
US2205280A
Cited
US2423929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |