Patent US1060753A successfully refreshed from Google Patents.
Patent US1948095A successfully refreshed from Google Patents.
Patent US2487819A successfully refreshed from Google Patents.
US2487819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for indicating the operations of machines
Assignee: Individual
•
Filing: 1939-10-06
•
Granted: 1949-11-15
•
Expires: 1959-10-06
Abstract
No abstract record available.
Inventors
- 👤 Myron D Markley
- 👤 Jr Joseph M Markley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:08
CPC Classifications
G; G07; G07C; G07C3/00; G07C3/02; G07C3/04; G07C3/045
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1964409A
Cited
US1340324A
Cited
US1309204A
Cited
US726301A
Cited
US1133028A
Cited
US1285049A
Cited
US1210481A
Cited
US1167566A
Cited
US1213963A
Cited
US1233637A
Cited
US1258803A
Cited
US1242483A
Cited
US1284430A
Cited
US1360568A
Cited
US1454493A
Cited
US1522874A
Cited
US2159727A
Cited
US2126347A
Cited
US2129362A
Cited
US2129727A
Cited
US2237767A
Cited
US2237137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |