US1821709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bolt
Assignee: Western Railway Equipment Co
•
Filing: 1930-07-28
•
Granted: 1931-09-01
•
Expires: 1950-07-28
Abstract
No abstract record available.
Inventors
- 👤 Louis A Hoerr
- 👤 Frank H Pietzsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:17
CPC Classifications
F; F16; F16B; F16B35/00; F16B35/04; F16B35/06; Y; Y10; Y10S; Y10S411/00; Y10S411/923
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) | 1934-08-31 | 1935-03-02 | 1935-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-31 | 1939-03-02 | 1939-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-31 | 1943-03-02 | 1943-09-01 | $7700.00 | Window Closed / Lapsed |