US2907249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens for signal lights
Assignee: Electro-Seal Corp
•
Filing: 1956-10-05
•
Granted: 1959-10-06
•
Expires: 1976-10-05
Abstract
No abstract record available.
Inventors
- 👤 Hans U Hjermstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:28
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/02; G02B3/08; F; F21; F21S; F21S43/00; F21S43/20; F21S43/255; F21W; F21W2111/00; F21W2111/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US197226A
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US586799A
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US2141159A
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GB190811054A
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GB215086A
Cited
US1824353A
Cited
US1942841A
Cited
US1890893A
Cited
US2144096A
Cited
US2286201A
Cited
US2292152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |