US2176381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transport operator
Assignee: Penn Electric Switch Co
•
Filing: 1938-10-03
•
Granted: 1939-10-17
•
Expires: 1958-10-03
Abstract
No abstract record available.
Inventors
- 👤 Burton E Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:16
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/18; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/1508; Y10T74/21; Y10T74/2142; Y10T74/2144
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) | 1942-10-16 | 1943-04-17 | 1943-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-16 | 1947-04-17 | 1947-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-16 | 1951-04-17 | 1951-10-17 | $7700.00 | Window Closed / Lapsed |