US2670832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line ruling attachment for typewriters
Assignee: Individual
•
Filing: 1952-04-16
•
Granted: 1954-03-02
•
Expires: 1972-04-16
Abstract
No abstract record available.
Inventors
- 👤 Hazel B Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:02
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/26; B41J29/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US259772A
Cited
US444636A
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US1397740A
Cited
US1746942A
Cited
US2219596A
Cited
US2297806A
Cited
US2431043A
Cited
US2551346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |