US3381381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rangefinder
Assignee: HARCOURT BRACE AND WORLD Inc
•
Filing: 1963-10-01
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Granted: 1968-05-07
•
Expires: 1983-10-01
Abstract
No abstract record available.
Inventors
- 👤 Ruchlis Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:15
CPC Classifications
G; G01; G01C; G01C3/00; G01C3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A RANGEFINDER COMPRISING AN ELONGATED TUBE WITH A LONGITUDINALLY EXTENDING SIGHT OPENING THERETHROUGH WHEREIN THE OPENING AT EACH END OF SAID TUBE IS IN THE FORM OF A POLYGON WITH NO TWO SIDES OF EITHER POLYGON BEING EQUAL, AND MEANS PROPORTIONAL TO THE LENGTH OF EACH SIDE OF SAID POLYGONS AND THE LENGTH OF SAID TUBE IMPRINTED ON SAID TUBE IN A MANNER SO THAT EACH MEANS MAY BE QUICKLY ASSOCIATED WITH THE APPROPRIATE PROPORTIONAL POLYGON SIDE.
Claim 2
Dependent Claim
77 words
A RANGEFINDER COMPRISING AN ELONGATED TUBE WITH A LONGITUDINALLY EXTENDING SIGHT OPENING THERETHROUGH WHEREIN THE OPENING AT EACH END OF SAID TUBE IS IN THE FORM OF A POLYGON WITH NO TWO SIDES OF EITHER POLYGON BEING EQUAL, AND MEANS PROPORTIONAL TO THE LENGTH OF EACH SIDE OF SAID POLYGONS AND THE LENGTH OF SAID TUBE IMPRINTED ON SAID TUBE IN A MANNER SO THAT EACH MEANS MAY BE QUICKLY ASSOCIATED WITH THE APPROPRIATE PROPORTIONAL POLYGON SIDE.
References Cited (Backward Citations)
US2189964A
Cited
US3031764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |