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US2669642A
Expired / Lapsed
US
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Electrically heated marking device
Assignee: Individual
•
Filing: 1951-11-13
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Granted: 1954-02-16
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Expires: 1971-11-13
Abstract
No abstract record available.
Inventors
- 👤 Lillian L Menges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:53
CPC Classifications
D; D06; D06H; D06H1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1807004A
Cited
US1012052A
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US1278842A
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US1422826A
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US2443749A
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US2441817A
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US2579088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |