Patent US901668A successfully refreshed from Google Patents.
US901668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety apparatus for railways.
Assignee: MAURICE ADELSON
•
Filing: 1908-03-18
•
Granted: 1908-10-20
•
Expires: 1928-03-18
Abstract
No abstract record available.
Inventors
- 👤 Samuel L Adelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:07
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08; B61L3/10; B61L3/106
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) | 1911-10-20 | 1912-04-20 | 1912-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-10-20 | 1916-04-20 | 1916-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-10-20 | 1920-04-20 | 1920-10-20 | $7700.00 | Window Closed / Lapsed |