Patent US4401406A successfully refreshed from Google Patents.
Patent US3433138A successfully refreshed from Google Patents.
US3433138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutter control system for photographic apparatus
Assignee: Polaroid Corp
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Filing: 1966-09-29
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Granted: 1969-03-18
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Expires: 1986-09-29
Abstract
No abstract record available.
Inventors
- 👤 John P Burgarella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:31
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0452; G03B7/00; G03B7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN PHOTOGRAPHIC APPARATUS INCLUDING AN EXPOSURE APERTURE FOR EXPOSING PHOTOSENSITIVE MATERIAL IN THE APPARATUS, THE COMBINATION COMPRISING: SHUTTER MEANS INCLUDING AT LEAST ONE EXPOSURE CONTROL MEMBER MOVABLE FROM AN INITIAL POSITION TO A FINAL POSITION TO CONTROL THE AMOUNT OF LIGHT ADMITTED BY THE EXPOSURE APERTURE DURING EXPOSURE; MEANS FOR URGING SAID EXPOSURE CONTROL MEMBER TOWARD SAID FINAL POSITION; ELECTRICAL CONTROL MEANS RESPONSIVE TO ELECTRICAL POTENTIALS EXCEEDING A PREDETERMINED LEVEL FOR RETAINING SAID EXPOSURE CONTROL MEMBER IN SAID INITIAL POSITION; FLASH CONNECTION MEANS FOR ENERGIZING A LUMINOUS ENERGY SOURCE; AND ELECTRICAL POWER SUPPLY MEANS FOR SUPPLYING ELECTRICAL POTENTIALS EXCEEDING SAID PREDETERMINED LEVEL ACROSS SAID CONTROL MEANS AND ACROSS SAID FLASH CONNECTION MEANS, SAID POWER SUPPLY MEANS HAVING SUFFICIENT RESISTANCE THAT UPON ENERGIZATION OF SAID LUMINOUS ENERGY SOURCE THE POTENTIAL APPLIED TO SAID CONTROL MEANS DROPS BELOW SAID PREDETERMINED LEVEL TO EFFECT A RELEASE OF SAID EXPOSURE CONTROL MEMBER.
Claim 2
Dependent Claim
148 words
IN PHOTOGRAPHIC APPARATUS INCLUDING AN EXPOSURE APERTURE FOR EXPOSING PHOTOSENSITIVE MATERIAL IN THE APPARATUS, THE COMBINATION COMPRISING: SHUTTER MEANS INCLUDING AT LEAST ONE EXPOSURE CONTROL MEMBER MOVABLE FROM AN INITIAL POSITION TO A FINAL POSITION TO CONTROL THE AMOUNT OF LIGHT ADMITTED BY THE EXPOSURE APERTURE DURING EXPOSURE; MEANS FOR URGING SAID EXPOSURE CONTROL MEMBER TOWARD SAID FINAL POSITION; ELECTRICAL CONTROL MEANS RESPONSIVE TO ELECTRICAL POTENTIALS EXCEEDING A PREDETERMINED LEVEL FOR RETAINING SAID EXPOSURE CONTROL MEMBER IN SAID INITIAL POSITION; FLASH CONNECTION MEANS FOR ENERGIZING A LUMINOUS ENERGY SOURCE; AND ELECTRICAL POWER SUPPLY MEANS FOR SUPPLYING ELECTRICAL POTENTIALS EXCEEDING SAID PREDETERMINED LEVEL ACROSS SAID CONTROL MEANS AND ACROSS SAID FLASH CONNECTION MEANS, SAID POWER SUPPLY MEANS HAVING SUFFICIENT RESISTANCE THAT UPON ENERGIZATION OF SAID LUMINOUS ENERGY SOURCE THE POTENTIAL APPLIED TO SAID CONTROL MEANS DROPS BELOW SAID PREDETERMINED LEVEL TO EFFECT A RELEASE OF SAID EXPOSURE CONTROL MEMBER.
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) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |