Patent US3099198A successfully refreshed from Google Patents.
US3099198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure control for photographic cameras
Assignee: Bell and Howell Co
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Filing: 1958-06-27
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Granted: 1963-07-30
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Expires: 1978-06-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:02
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
A MULTI-ELEMENT DIAPHRAGHM SYSTEM FOR PHOTOGRAPHIC CAMERAS COMPRISING A ROTATIONAL DIAPHRAGM MEMBER, MEANS ON SAID MEMBER CAUSING A STATIC UNBALANCE PROVIDING AN ECCENTRIC CENTER OF GRAVITY, A SEPARATE ROTARY COUNTTERBALANCE MEMBER INTERCONNECTED WITH SAID DIAPHRAGM MEMBER FOR ROTATION THEREWITH IN THE SAME DIRECTION AT THE SAME ANGULAR VELOCITY, SAID COUNTERBALANCE HAVING A CENTER OF GRAVITY POSITIONED 180* OUT OF PHASE WITH THE UNBALANCE OF SAID DIAPHRAGM MEMBER AND BALANCING SAID SYSTEM.
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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) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |