Patent US3190176A successfully refreshed from Google Patents.
US3190176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic objective for use in enlarging or reducing devices
Assignee: Bausch and Lomb Inc
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Filing: 1962-11-13
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Granted: 1965-06-22
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Michael J Buzawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:46
CPC Classifications
G; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A PHOTOGRAPHIC OBJECTIVE FOR PHOTOGRAPHIC ENLARGING OR REDUCING DEVICES HAVING A RELATIVE APERTURE OF SUBSTANTIALLY F/3.0 SAID OBJECTIVE COMRPISING IN OPTICAL ALIGNMENT A NEGATIVE FIELD FLATTENING LENS LOCATED NEAREST TO THE OBJECTIVE, A PAIR OF POSITIVE SINGLET LENSES SPACED REARWARDLY THEREOF IN OPTICAL ALIGNMENT WITH THE FIRST LENS, A PAIR OF MUTUALLY SPACED NEGATIVE MENISCUS LENSES ARRANGED CONCAVE TO EACH OTHER ON OPPOSITE SIDES OF AN INTERPOSED DIAPHRAGM AND REARWARDLY SPACED FROM SAID POSITIVE LENSES, AND A SECOND PAIR OF SINGLET POSITIVE LENSES REARWARDLY SPACED FROM AND OPTICALLY ALIGNED WITH SAID NEGATIVE LENSES, SAID SUCCESSIVE LENSES HAVING FOCAL LENGTHS WHICH ARE DESIGNATED F1 TO F7 AND HAVING AXIAL THICKNESSES T1 TO T7 AXIAL SPACINGS S1 TO S6, AND REFRACTIVE INDEX ND AND ABBE NUMBER V OF THE GLASS FROM WHICH SAID LENSES ARE MADE WHICH ARE SPECIFIED NUMERICALLY IN THE TABLE OF MATHEMATICAL STATEMENTS HEREBELOW,
Claim 2
Dependent Claim
145 words
A PHOTOGRAPHIC OBJECTIVE FOR PHOTOGRAPHIC ENLARGING OR REDUCING DEVICES HAVING A RELATIVE APERTURE OF SUBSTANTIALLY F/3.0 SAID OBJECTIVE COMRPISING IN OPTICAL ALIGNMENT A NEGATIVE FIELD FLATTENING LENS LOCATED NEAREST TO THE OBJECTIVE, A PAIR OF POSITIVE SINGLET LENSES SPACED REARWARDLY THEREOF IN OPTICAL ALIGNMENT WITH THE FIRST LENS, A PAIR OF MUTUALLY SPACED NEGATIVE MENISCUS LENSES ARRANGED CONCAVE TO EACH OTHER ON OPPOSITE SIDES OF AN INTERPOSED DIAPHRAGM AND REARWARDLY SPACED FROM SAID POSITIVE LENSES, AND A SECOND PAIR OF SINGLET POSITIVE LENSES REARWARDLY SPACED FROM AND OPTICALLY ALIGNED WITH SAID NEGATIVE LENSES, SAID SUCCESSIVE LENSES HAVING FOCAL LENGTHS WHICH ARE DESIGNATED F1 TO F7 AND HAVING AXIAL THICKNESSES T1 TO T7 AXIAL SPACINGS S1 TO S6, AND REFRACTIVE INDEX ND AND ABBE NUMBER V OF THE GLASS FROM WHICH SAID LENSES ARE MADE WHICH ARE SPECIFIED NUMERICALLY IN THE TABLE OF MATHEMATICAL STATEMENTS HEREBELOW,
Claim 3
Dependent Claim
21 words
0F<-F1<2.44F 1.64F<F2<2.0F 2.10<F3<2.56F 4.86F<-F4<5.94F 3.98F<-F5<4.86F 3.00F<F6<3.67F 2.56F<F7<3.13F .0408F<T1<.0498F .0381F<T2<.0465F .0364F<T3<.1784F .0550F<T4<.0672 .0550F<T5<.0672F .1487F<T6<.1817F .0381F<T7<.0465F .0399F<T8<.0487F .701F<S1<.857F .00200F<S2<.00244F .00463F<S3<.00565F .244F<S4<.396F .00463F<S5<.00565F .00200F<S6<.00244F
Claim 4
Dependent Claim
21 words
0F<-F1<2.44F 1.64F<F2<2.0F 2.10<F3<2.56F 4.86F<-F4<5.94F 3.98F<-F5<4.86F 3.00F<F6<3.67F 2.56F<F7<3.13F .0408F<T1<.0498F .0381F<T2<.0465F .0364F<T3<.1784F .0550F<T4<.0672 .0550F<T5<.0672F .1487F<T6<.1817F .0381F<T7<.0465F .0399F<T8<.0487F .701F<S1<.857F .00200F<S2<.00244F .00463F<S3<.00565F .244F<S4<.396F .00463F<S5<.00565F .00200F<S6<.00244F
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |