Patent US3271865A successfully refreshed from Google Patents.
US3271865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surveyor's target
Assignee: Individual
•
Filing: 1964-07-02
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Granted: 1966-09-13
•
Expires: 1984-07-02
Abstract
No abstract record available.
Inventors
- 👤 Roger D Glidden
- 👤 Charles E Glidden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:27
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/02; G01C15/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A SURVEYOR''S TARGET FOR USE ON A PLUMB LINE, SAID TARGET COMPRISING A PLAQUE OF STIFF PLASTIC MATERIAL, SAID PLAQUE BEING DIVIDED INTO OPAQUE AREAS AND OTHER AREAS OF TRANSPARENT-FLUORESCENT MATERIAL SO ARRANGED RELATIVE TO SAID APAQUE AREAS TO FACILITATE ALIGNMENT OF THE CROSSHAIRS OF A SIGHTING INSTRUMENT THEREON WITH THE VERTICAL CROSS HAIR COINCIDENT WITH A PLUMB LINE, SAID PLAQUE BEING SUBSTANTIALLY TRANSPARENT THROUGHOUT THE THICKNESS OF SAID TRANSPARENT-FLUORESCENT AREAS WHEREBY THE LATTER ARE ACTIVATED IN THE DAYTIME BY THE LIGHT REARWARD THEREOF, AND
Claim 2
Dependent Claim
85 words
A SURVEYOR''S TARGET FOR USE ON A PLUMB LINE, SAID TARGET COMPRISING A PLAQUE OF STIFF PLASTIC MATERIAL, SAID PLAQUE BEING DIVIDED INTO OPAQUE AREAS AND OTHER AREAS OF TRANSPARENT-FLUORESCENT MATERIAL SO ARRANGED RELATIVE TO SAID APAQUE AREAS TO FACILITATE ALIGNMENT OF THE CROSSHAIRS OF A SIGHTING INSTRUMENT THEREON WITH THE VERTICAL CROSS HAIR COINCIDENT WITH A PLUMB LINE, SAID PLAQUE BEING SUBSTANTIALLY TRANSPARENT THROUGHOUT THE THICKNESS OF SAID TRANSPARENT-FLUORESCENT AREAS WHEREBY THE LATTER ARE ACTIVATED IN THE DAYTIME BY THE LIGHT REARWARD THEREOF, AND
References Cited (Backward Citations)
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US1346360A
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US1500482A
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US1778323A
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US2579644A
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US2663937A
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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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |