US1508225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for ventilating railway motors
Assignee: Westinghouse Electric Corp
•
Filing: 1923-07-20
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Granted: 1924-09-09
•
Expires: 1943-07-20
Abstract
No abstract record available.
Inventors
- 👤 David C Hershberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:17
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/02; H02K9/04; H02K9/06; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2186; Y10T74/2189
Claims Analysis
Total Claims: 0
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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) | 1927-09-09 | 1928-03-10 | 1928-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-09-09 | 1932-03-10 | 1932-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-09-09 | 1936-03-10 | 1936-09-09 | $7700.00 | Window Closed / Lapsed |