Patent US2678978A successfully refreshed from Google Patents.
US2678978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling device
Assignee: Individual
•
Filing: 1951-12-21
•
Granted: 1954-05-18
•
Expires: 1971-12-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:15
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/44; B60Q1/441; B21; B21B; B21B37/00; B21B37/58; B21B37/64; B21C; B21C37/00; B21C37/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US376072A
Cited
US1290701A
Cited
US1473212A
Cited
US1625565A
Cited
US1819196A
Cited
US1956056A
Cited
US2096069A
Cited
US2128769A
Cited
US2301583A
Cited
US2276378A
Cited
US2339910A
Cited
US2520681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |