US3234849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic projection device
Assignee: Individual
•
Filing: 1965-04-13
•
Granted: 1966-02-15
•
Expires: 1985-04-13
Abstract
No abstract record available.
Inventors
- 👤 Frank G Back
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:32
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/46; G03B27/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROJECTION DEVICE FOR PHOTOGRAPHIC FILM CONTAINING A PLURALITY OF MINUTE PHOTOGRAPHS COMPRISING A BASE SUPPORT, A FILM RECEIVING HOUSING SLIDABLY CARRIED BY THE BASE SUPPORT, AN OBJECTIVE LENS SYSTEM CARRIED BY AND TRANSVERSING THE BASE SUPPORT, A LAST LENS ELEMENT IN THE OBJECTIVE, MEANS TO FEED A PHOTOGRAPHIC FILM THROUGH THE HOUSING AND ACROSS THE LAST LENS ELEMENT OF THE OBJECTIVE, MEANS TO HOLD THE FILM IN INTIMATE CONTACT WITH THE SURFACE OF THE LAST OBJECTIVE LENS, A PROJECTION LAMP HOUSING SECURED TO THE BASE SUPPORT, A LAMP IN THE PROJECTION LAMP HOUSING, A FIRST MIRROR TO RECEIVE LIGHT FROM THE LAMP, A SECOND MIRROR TO RECEIVE LIGHT FROM THE FIRST MIRROR, SAID FIRST AND SECOND MIRROR HAVING THE PROPERTY OF REFLECTING
Claim 2
Dependent Claim
123 words
A PROJECTION DEVICE FOR PHOTOGRAPHIC FILM CONTAINING A PLURALITY OF MINUTE PHOTOGRAPHS COMPRISING A BASE SUPPORT, A FILM RECEIVING HOUSING SLIDABLY CARRIED BY THE BASE SUPPORT, AN OBJECTIVE LENS SYSTEM CARRIED BY AND TRANSVERSING THE BASE SUPPORT, A LAST LENS ELEMENT IN THE OBJECTIVE, MEANS TO FEED A PHOTOGRAPHIC FILM THROUGH THE HOUSING AND ACROSS THE LAST LENS ELEMENT OF THE OBJECTIVE, MEANS TO HOLD THE FILM IN INTIMATE CONTACT WITH THE SURFACE OF THE LAST OBJECTIVE LENS, A PROJECTION LAMP HOUSING SECURED TO THE BASE SUPPORT, A LAMP IN THE PROJECTION LAMP HOUSING, A FIRST MIRROR TO RECEIVE LIGHT FROM THE LAMP, A SECOND MIRROR TO RECEIVE LIGHT FROM THE FIRST MIRROR, SAID FIRST AND SECOND MIRROR HAVING THE PROPERTY OF REFLECTING
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |