US2586420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing mechanism for adding machines
Assignee: Friden Calculating Machine Co Inc
•
Filing: 1946-08-12
•
Granted: 1952-02-19
•
Expires: 1966-08-12
Abstract
No abstract record available.
Inventors
- 👤 Grant C Ellerbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:53
CPC Classifications
G; G06; G06C; G06C11/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1611390A
Cited
US2226919A
Cited
US2369252A
Cited
US1394256A
Cited
US1910201A
Cited
US1507253A
Cited
US2266845A
Cited
GB190000336A
Cited
US1084591A
Cited
US1208288A
Cited
US1400105A
Cited
US1948958A
Cited
US2059905A
Cited
US2259581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |