Patent US3423155A successfully refreshed from Google Patents.
US3423155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical sight
Assignee: Northrop Grumman Corp
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Filing: 1964-04-13
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Granted: 1969-01-21
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Expires: 1984-04-13
Abstract
No abstract record available.
Inventors
- 👤 Donald W Herrick
- 👤 Robert A Beam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:12
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/14; G02B27/00; G02B27/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
AN OPTICAL SIGHT COMPRISING A FRAME HAVING UPRIGHT AND BASE PORTIONS, SAID UPRIGHT PORTION BEING OF INVERTED U-SHAPE WITH SPACED LEGS EXTENDING UPWARDLY FROM SAID BASE PORTION AND WITH A HORIZONTAL MEMBER JOINING SAID LEGS AT THE SUMMIT THEREOF, SAID BASE PORTION EXTENDING GENERALLY HORIZONTALLY AND HAVING A CYLINDRICAL RING PART DEPENDING BENEATH THE LEGS OF SAID UPRIGHT PORTION, A LIGHT SOURCE AND AN OPAQUE DISC HAVING A LIGHT-TRANSMITTING PORTION THEREIN DEFINING A RETICLE, SAID LIGHT SOURCE AND SAID RETICLE BEING ENCASED AND MOUNTED UPON SAID HORIZONTAL MEMBER OF SAID UPRIGHT FRAME PORTION AND ADAPTED TO PROJECT A LIGHT BEAM DOWNWARDLY THEREFROM, A MANGIN MIRROR FIXED WITHIN SAID CYLINDRICAL RING PART FACING SAID LIGHT SOURCE, SAID LIGHT SOURCE INCLUDING A PLURALITY OF LAMPS AND MEANS ENABLING ONE OF SAID LAMPS TO BE QUICKLY AND EASILY MOVED INTO POSITION DIRECTLY ABOVE SAID MIRROR, A TRANSPARENT VIEWING PLATE PIVOTALLY MOUNTED BETWEEN AND UPON SAID LEGS AND BETWEEN SAID LIGHT SOURCE AND SAID MIRROR WHEREBY AN OPTICAL IMAGE OF SAID RETICLE MAY BE PROVIDED ON SAID VIEWING PLATE, AND
Claim 2
Dependent Claim
176 words
AN OPTICAL SIGHT COMPRISING A FRAME HAVING UPRIGHT AND BASE PORTIONS, SAID UPRIGHT PORTION BEING OF INVERTED U-SHAPE WITH SPACED LEGS EXTENDING UPWARDLY FROM SAID BASE PORTION AND WITH A HORIZONTAL MEMBER JOINING SAID LEGS AT THE SUMMIT THEREOF, SAID BASE PORTION EXTENDING GENERALLY HORIZONTALLY AND HAVING A CYLINDRICAL RING PART DEPENDING BENEATH THE LEGS OF SAID UPRIGHT PORTION, A LIGHT SOURCE AND AN OPAQUE DISC HAVING A LIGHT-TRANSMITTING PORTION THEREIN DEFINING A RETICLE, SAID LIGHT SOURCE AND SAID RETICLE BEING ENCASED AND MOUNTED UPON SAID HORIZONTAL MEMBER OF SAID UPRIGHT FRAME PORTION AND ADAPTED TO PROJECT A LIGHT BEAM DOWNWARDLY THEREFROM, A MANGIN MIRROR FIXED WITHIN SAID CYLINDRICAL RING PART FACING SAID LIGHT SOURCE, SAID LIGHT SOURCE INCLUDING A PLURALITY OF LAMPS AND MEANS ENABLING ONE OF SAID LAMPS TO BE QUICKLY AND EASILY MOVED INTO POSITION DIRECTLY ABOVE SAID MIRROR, A TRANSPARENT VIEWING PLATE PIVOTALLY MOUNTED BETWEEN AND UPON SAID LEGS AND BETWEEN SAID LIGHT SOURCE AND SAID MIRROR WHEREBY AN OPTICAL IMAGE OF SAID RETICLE MAY BE PROVIDED ON SAID VIEWING PLATE, AND
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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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |