US2675904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Front-feed attachment device for bookkeeping machines
Assignee: RUFBUCHHALTUNG AG
•
Filing: 1950-11-02
•
Granted: 1954-04-20
•
Expires: 1970-11-02
Abstract
No abstract record available.
Inventors
- 👤 Maurer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:48
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/36; B41J11/38; B41J11/48; B41J11/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US531893A
Cited
US2086945A
Cited
US2216081A
Cited
US2142603A
Cited
US2326291A
Cited
US2387068A
Cited
US2411335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |