US3444979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbon feeding device for a variable spacing typewriter
Assignee: Olivetti SpA
•
Filing: 1966-06-02
•
Granted: 1969-05-20
•
Expires: 1986-06-02
Abstract
No abstract record available.
Inventors
- 👤 Bernardino Francisco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
B; B41; B41J; B41J33/00; B41J33/14; B41J33/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2734614A
Cited
US805060A
Cited
US1643266A
Cited
US2161856A
Cited
US2224766A
Cited
US2425967A
Cited
US2609077A
Cited
US3026987A
Cited
US2972402A
Cited
US3151722A
Cited
US3288262A
Cited
US3346090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |