Patent US3146608A successfully refreshed from Google Patents.
Patent US2549401A successfully refreshed from Google Patents.
US2549401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipoint recorder
Assignee: Leeds and Northrup Co
•
Filing: 1944-10-28
•
Granted: 1951-04-17
•
Expires: 1964-10-28
Abstract
No abstract record available.
Inventors
- 👤 Irving M Stein
- 👤 Jr Albert J Williams
- 👤 Clark William Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:57
CPC Classifications
G; G01; G01D; G01D9/00; G01D9/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1443165A
Cited
USRE15617E
Cited
US963908A
Cited
DE322333C
Cited
US1496101A
Cited
US1614222A
Cited
US1898124A
Cited
US1947255A
Cited
US1982053A
Cited
US2207343A
Cited
US2083408A
Cited
US2230779A
Cited
US2313752A
Cited
US2314720A
Cited
US2319412A
Cited
US2366913A
Cited
US2316240A
Cited
US2335755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |