Patent US2717684A successfully refreshed from Google Patents.
US2717684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple use typewriter
Assignee: Individual
•
Filing: 1951-12-15
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Granted: 1955-09-13
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Expires: 1971-12-15
Abstract
No abstract record available.
Inventors
- 👤 Raymond N Harter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:10
CPC Classifications
B; B41; B41J; B41J3/00; B41J3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US441880A
Cited
US567973A
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US573868A
Cited
US703954A
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US1141831A
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US1725231A
Cited
US2102008A
Cited
CH242175A
Cited
US2460813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |