US2492034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminated writing unit
Assignee: Individual
•
Filing: 1947-08-27
•
Granted: 1949-12-20
•
Expires: 1967-08-27
Abstract
No abstract record available.
Inventors
- 👤 Clarence T Clyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:29
CPC Classifications
B; B42; B42F; B42F9/00; B42F9/001; B42D; B42D5/00; B42D5/003; B42D5/005; B42D5/006; B42D5/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1211759A
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US2029425A
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US2161872A
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US2120238A
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US2261000A
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US2307468A
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US2329556A
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US2395760A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |