Patent US3651748A successfully refreshed from Google Patents.
US3651748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera iris blade
Assignee: OSAWA SEIMITSU KOGYO (OSAWA PRECISION INDUSTRIES LTD) KK
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Filing: 1969-12-11
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Granted: 1972-03-28
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Expires: 1989-12-11
Abstract
Abstract An iris blade with an integral exposure indicator formed from a sheet of synthetic resin having different colored areas, one color for the indicator and another color for the blade.
Inventors
- 👤 Risaburo Yoshiada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:29
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B17/00; G03B17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
An iris blade for a camera comprising: a body portion stamped from a sheet of non-opaque synthetic resin material having a predetermined color, said body portion being treated to be substantially opaque and a color different from said predetermined color; and an indicator portion formed integrally with said body portion from said sheet of synthetic resin material of said predetermined color.
Claim 2
Dependent Claim
61 words
An iris blade for a camera comprising: a body portion stamped from a sheet of non-opaque synthetic resin material having a predetermined color, said body portion being treated to be substantially opaque and a color different from said predetermined color; and an indicator portion formed integrally with said body portion from said sheet of synthetic resin material of said predetermined color.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |