Patent US3267278A successfully refreshed from Google Patents.
US3267278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens and lens assemblies
Assignee: Elastic Stop Nut Corp
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Filing: 1965-02-24
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Granted: 1966-08-16
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Expires: 1985-02-24
Abstract
No abstract record available.
Inventors
- 👤 Harold A Doolittle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:34
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/12; G02B5/122; G02B5/124
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A LENS FOR REFLECTING THEREFROM LIGHT FALLING UPON ONE FACE THEREOF TO REFLECT THE LIGHT BACK TOWARD THE SOURCE THEREOF AND FOR TRANSMITTING THERETHROUGH AND FOCUSING LIGHT FALLING UPON THE OTHER FACE THEREOF TO DIRECT THE LIGHT INTO A PREDETERMINED PATTERN, SAID LENS COMPRISING A BODY OF TRANSPARENT MATERIAL HAVING A FRONT FACE AND A REAR FACE, A PLURALITY OF RETRODIRECTIVE REFLECTOR ELEMENTS ON SAID BODY AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT A PREDETERMINED AREA THEREOF, SAID REFLECTOR ELEMENTS REFLECTING FROM SAID LENS LIGHT FALLING UPON SAID FRONT FACE IN SAID PREDETERMINED AREA FOR REFLECTING THE LIGHT BACK TOWARD THE SOURCE THEREOF, AND A PLURALITY OF LIGHT FOCUSING OPTIC ELEMENTS ON SAID BODY AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT SAID PREDETERMINED AREA AND SUBSTANTIALLY UNIFORMLY INTERMINGLED WITH SAID REFLECTOR ELEMENTS, SAID OPTIC ELEMENTS
Claim 2
Dependent Claim
131 words
A LENS FOR REFLECTING THEREFROM LIGHT FALLING UPON ONE FACE THEREOF TO REFLECT THE LIGHT BACK TOWARD THE SOURCE THEREOF AND FOR TRANSMITTING THERETHROUGH AND FOCUSING LIGHT FALLING UPON THE OTHER FACE THEREOF TO DIRECT THE LIGHT INTO A PREDETERMINED PATTERN, SAID LENS COMPRISING A BODY OF TRANSPARENT MATERIAL HAVING A FRONT FACE AND A REAR FACE, A PLURALITY OF RETRODIRECTIVE REFLECTOR ELEMENTS ON SAID BODY AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT A PREDETERMINED AREA THEREOF, SAID REFLECTOR ELEMENTS REFLECTING FROM SAID LENS LIGHT FALLING UPON SAID FRONT FACE IN SAID PREDETERMINED AREA FOR REFLECTING THE LIGHT BACK TOWARD THE SOURCE THEREOF, AND A PLURALITY OF LIGHT FOCUSING OPTIC ELEMENTS ON SAID BODY AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT SAID PREDETERMINED AREA AND SUBSTANTIALLY UNIFORMLY INTERMINGLED WITH SAID REFLECTOR ELEMENTS, SAID OPTIC ELEMENTS
References Cited (Backward Citations)
US1874138A
Cited
US2003804A
Cited
US2075367A
Cited
US2315721A
Cited
US2308100A
Cited
US2306732A
Cited
US2473588A
Cited
US2464738A
Cited
US2682807A
Cited
US2818500A
Cited
US3001062A
Cited
US2907249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |