Patent US3450459A successfully refreshed from Google Patents.
US3450459A
Expired / Lapsed
US
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Retroreflective device
Assignee: WALTER F HAGGERTY
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Filing: 1965-10-24
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Granted: 1969-06-17
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Walter F Haggerty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/12; G02B5/122; G02B5/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US285270A
Cited
US2310790A
Cited
GB330080A
Cited
US2128390A
Cited
GB490237A
Cited
FR873098A
Cited
FR986757A
Cited
US3057256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |