US3236488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic apparatus
Assignee: Individual
•
Filing: 1963-02-26
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Granted: 1966-02-22
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Expires: 1983-02-26
Abstract
No abstract record available.
Inventors
- 👤 Dennis E Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:13
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
IN A SUPPORT STRUCTURE FOR SHEETS, FILMS, AND THE LIKE, THE COMBINATION COMPRISING A SUPPORT PLATE HAVING A PLURALITY OF INDIVIDUAL OPENINGS DISTRIBUTED OVER ITS SURFACE AREA, A PASSAGEWAY IN DIRECT COMMUNICATION WITH EACH OF SAID OPENINGS THROUGH WHICH A VACUUM MAY BE APPLIED TO RETAIN A SHEET IN CONTACT WITH SAID SUPPORT PLATE, VALVE MEANS POSITIONED WITHIN EACH OF SAID OPENINGS IN COMMUNICATION WITH SAID PASSAGEWAY, SAID VALVE MEANS COMPRISING A BALL MEMBER RETAINED IN EACH OF SAID OPENINGS AND A VALVE SEAT IN SAID SUPPORT STRUCTURE AT THE INTERSECTION OF SAID PASSAGEWAY WITH EACH OF SAID OPENINGS, WHEREBY SAID VALVE MEANS WILL BE FIRMLY RETAINED AGAINST SAID VALVE SEAT BY THE APPLICATION OF A VACUUM, SAID VALVE SEAT BEING FORMED BY THE NATURAL CONTOUR OF THE INTERSECTION OF SAID OPENING AND SAID PASSAGEWAY, SAID PASSAGEWAY COMPRISING A FIRST MAIN PASSAGEWAY AND A PLURALITY OF TRIBUTARY PASSAGWAYS, EACH OF SAID TRIBUTARY PASSAGEWAYS BEING IN DIRECT COMMUNICATION WITH ONE OF SAID OPENINGS AND VALVE MEANS, AND EACH OF SAID TRIBUTARY PASSAGWAYS POSITIONED SUCH THAT ITS CENTER IS LESS THAN THE RADIUS OF SAID BALL MEMBER FROM THE WORKING SURFACE.
Claim 2
Dependent Claim
189 words
IN A SUPPORT STRUCTURE FOR SHEETS, FILMS, AND THE LIKE, THE COMBINATION COMPRISING A SUPPORT PLATE HAVING A PLURALITY OF INDIVIDUAL OPENINGS DISTRIBUTED OVER ITS SURFACE AREA, A PASSAGEWAY IN DIRECT COMMUNICATION WITH EACH OF SAID OPENINGS THROUGH WHICH A VACUUM MAY BE APPLIED TO RETAIN A SHEET IN CONTACT WITH SAID SUPPORT PLATE, VALVE MEANS POSITIONED WITHIN EACH OF SAID OPENINGS IN COMMUNICATION WITH SAID PASSAGEWAY, SAID VALVE MEANS COMPRISING A BALL MEMBER RETAINED IN EACH OF SAID OPENINGS AND A VALVE SEAT IN SAID SUPPORT STRUCTURE AT THE INTERSECTION OF SAID PASSAGEWAY WITH EACH OF SAID OPENINGS, WHEREBY SAID VALVE MEANS WILL BE FIRMLY RETAINED AGAINST SAID VALVE SEAT BY THE APPLICATION OF A VACUUM, SAID VALVE SEAT BEING FORMED BY THE NATURAL CONTOUR OF THE INTERSECTION OF SAID OPENING AND SAID PASSAGEWAY, SAID PASSAGEWAY COMPRISING A FIRST MAIN PASSAGEWAY AND A PLURALITY OF TRIBUTARY PASSAGWAYS, EACH OF SAID TRIBUTARY PASSAGEWAYS BEING IN DIRECT COMMUNICATION WITH ONE OF SAID OPENINGS AND VALVE MEANS, AND EACH OF SAID TRIBUTARY PASSAGWAYS POSITIONED SUCH THAT ITS CENTER IS LESS THAN THE RADIUS OF SAID BALL MEMBER FROM THE WORKING SURFACE.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |