Patent US3101412A successfully refreshed from Google Patents.
US3101412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spore growth prevention in optical instruments
Assignee: Cooke Troughton and Simms Ltd
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Filing: 1957-08-05
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Granted: 1963-08-20
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Expires: 1977-08-05
Abstract
No abstract record available.
Inventors
- 👤 Scott-Maxwell Peter Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:07
CPC Classifications
G; G01; G01C; G01C25/00; G02; G02B; G02B27/00; G02B27/0006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
AN OPTICAL INSTRUMENT COMPRISING A BODY, AT LEAST ONE OPTICAL ELEMENT IN SAID BODY, A FIRST WALL PORTION OF SAID BODY DEFINING THEREIN AT LEAST ONE OPTICAL PASSAGE OPERATIVELY ASSOCIATED WITH SAID ELEMENT, A SECOND WALL PORTION OF SAID BODY DEFINING THEREIN A RESTRICTED PASSAGE THROUGH WHICH AIR ENTERS AND LEAVES SAID BODY, SAID RESTRICTED PASSAGE HAVING A CROSS-SECTION WHICH IS SMALL COMPARED TO THE SIZE OF SAID OPTICAL ELEMENT, SAID RESTRICTED PASSAGE BEING CONNECTED TO BUT REMOVED FROM SAID OPTICAL PASSAGE, AND A SOURCE OF BETA RADIATION ON SAID SECOND WALL PORTION FOR RADIATING SPORE INHIBITING BETA RAYS ACROSS SAID RESTRICTED PASSAGE WHEREBY SPORES ARE IRRADIATED PRIOR TO ENTERING SAID OPTICAL PATH, SAID SOURCE HAVING A STRENGTH DEPENDING ON THE SIZE OF SAID PASSAGE AND INDEPENDENT OF THE SIZE OF SAID OPTICAL ELEMENT.
Claim 2
Dependent Claim
134 words
AN OPTICAL INSTRUMENT COMPRISING A BODY, AT LEAST ONE OPTICAL ELEMENT IN SAID BODY, A FIRST WALL PORTION OF SAID BODY DEFINING THEREIN AT LEAST ONE OPTICAL PASSAGE OPERATIVELY ASSOCIATED WITH SAID ELEMENT, A SECOND WALL PORTION OF SAID BODY DEFINING THEREIN A RESTRICTED PASSAGE THROUGH WHICH AIR ENTERS AND LEAVES SAID BODY, SAID RESTRICTED PASSAGE HAVING A CROSS-SECTION WHICH IS SMALL COMPARED TO THE SIZE OF SAID OPTICAL ELEMENT, SAID RESTRICTED PASSAGE BEING CONNECTED TO BUT REMOVED FROM SAID OPTICAL PASSAGE, AND A SOURCE OF BETA RADIATION ON SAID SECOND WALL PORTION FOR RADIATING SPORE INHIBITING BETA RAYS ACROSS SAID RESTRICTED PASSAGE WHEREBY SPORES ARE IRRADIATED PRIOR TO ENTERING SAID OPTICAL PATH, SAID SOURCE HAVING A STRENGTH DEPENDING ON THE SIZE OF SAID PASSAGE AND INDEPENDENT OF THE SIZE OF SAID OPTICAL ELEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |