Patent US3213752A successfully refreshed from Google Patents.
US3213752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical valve responsive to intense light flash
Assignee: Isomet Corp
•
Filing: 1961-03-14
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Granted: 1965-10-26
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Expires: 1981-03-14
Abstract
No abstract record available.
Inventors
- 👤 Ruderman Irving Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:37
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN COMBINATION, A MIRROR; SAID MIRROR COMPRISING A FIRST ELECTRICALLY INSULATING LIGHT TRANSPARENT MEMBER, A SECOND ELECTRICALLY CONDUCTING MEMBER OF HIGH LIGHT REFECTIVITY SECURED TO SAID FIRST MEMBER; AND MEANS FOR AT WILL APPLYING SUFFICIENT POWER BETWEEN SPACED POINTS ON SAID SECOND MEMBER TO EXPLODE SAID SECOND MEMBER.
Claim 2
Dependent Claim
26 words
A VIEWING DEVICE TO PREVENT DAMAGE IN RESPONSE TO A BRIGHT LIGHT FLASH COMPRISING FIRST AND SECOND REFLECTORS, SAID REFLECTORS BEING POSITIONED SO THAT A LIGHT
References Cited (Backward Citations)
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US2750832A
Cited
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |