US3461997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knob assembly for typewriter platen or the like
Assignee: Emhart Enterprises Corp
•
Filing: 1968-10-21
•
Granted: 1969-08-19
•
Expires: 1988-10-21
Abstract
No abstract record available.
Inventors
- 👤 Donald R Humphreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:55
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/76; B41J19/78; B41J19/96; Y; Y10; Y10T; Y10T74/00; Y10T74/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1056703A
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US1136223A
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US1189743A
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US1381143A
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US2932986A
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US2943513A
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US2930254A
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US3187862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |