US2551346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ruling guide for typewriters
Assignee: Individual
•
Filing: 1947-07-16
•
Granted: 1951-05-01
•
Expires: 1967-07-16
Abstract
No abstract record available.
Inventors
- 👤 Ira G Sellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:49
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/26; B41J29/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US734937A
Cited
US1199228A
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US1397740A
Cited
US1546137A
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US2060327A
Cited
US2431043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |