US3208174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination devices
Assignee: Individual
•
Filing: 1962-04-05
•
Granted: 1965-09-28
•
Expires: 1982-04-05
Abstract
No abstract record available.
Inventors
- 👤 Charles M Wrenshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:11
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0081; G02B6/0095; G02B6/0005; G02B6/0008; G09; G09F; G09F13/00; Y; Y10; Y10S; Y10S362/00; Y10S362/812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1004671A
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US1351562A
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US1964591A
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US2126729A
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US2293185A
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US2448244A
Cited
US2531937A
Cited
US2646637A
Cited
US2689948A
Cited
US2843002A
Cited
US3137447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |