US3915559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short focal length large aperture optical system
Assignee: Bell and Howell Co
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Filing: 1974-10-15
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Granted: 1975-10-28
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Expires: 1994-10-15
Abstract
Abstract This invention relates to a short focal length, large aperture optical system primarily designed to efficiently transmit light rays to an image plane with an extraordinarily high degree of correction over a prescribed field.
Inventors
- 👤 Andor A Fleischman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:00
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/24; G02B9/00; G02B9/34
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 2
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 3
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 4
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 5
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 6
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 7
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 8
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 9
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following speficiation:
Claim 10
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following speficiation:
Claim 11
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 12
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 13
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 14
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 15
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 16
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having substantially the following specification:
Claim 17
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having subStantially the following specification:
Claim 18
Dependent Claim
16 words
An optical system of relatively short focal length and large aperture having subStantially the following specification:
References Cited (Backward Citations)
US3868174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |