US3245746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection apparatus and film magazine therefor
Assignee: Mast Development Co
•
Filing: 1962-03-13
•
Granted: 1966-04-12
•
Expires: 1982-03-13
Abstract
No abstract record available.
Inventors
- 👤 Gifford M Mast
- 👤 Wright K Gannett
- 👤 Wesley A Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:12
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
PROJECTION APPARATUS, COMPRISING: SUPPORT STRUCTURE INCLUDING AN UPRIGHT, HOLLOW MOUNTING ELEMENT HAVING FRONT AND REAR AND OPPOSITE SIDE WALLS, TWO OF SAID WALLS BEING PARALLEL AND SAID REAR WALL HAVING AN APERTURE THEREIN; AN OPTICAL SYSTEM ON SAID STRUCTURE, INCLUDING A PART EXTERNALLY OF AND A PART WITHIN SAID ELEMENT, FOR TRANSMITTING LIGHT THROUGH SAID APERTURE; A FILM MAGAZINE HAVING INTERIOR UPRIGHT WALLS DEFINING AN OPENING THEREIN DIMENSIONED AND SHAPED TO RECEIVE SAID ELEMENT, AN OPPOSED PAIR OF SAID MAGAZINE WALLS BEING PARALLEL AND SPACED APART ON THE ORDER OF AND COOPERATIVE WITH THE AFORESAID PARALLEL WALLS OF THE ELEMENT TO LOCATE THE MAGAZINE ON THE ELEMENT AND TO PROVIDE FOR SLIDABLE DOWNWARD MOUNTING OF SAID MAGAZINE ON SLIDABLE AND UPWARD REMOVAL THEREOF FROM SAID ELEMENT, SAID MAGAZINE WHEN MOUNTED HAVING A REAR PART CLOSELY BEHIND THE ELEMENT REAR WALL AND FIRST AND SECOND SIDE PARTS RESPECTIVELY AT
Claim 2
Dependent Claim
148 words
PROJECTION APPARATUS, COMPRISING: SUPPORT STRUCTURE INCLUDING AN UPRIGHT, HOLLOW MOUNTING ELEMENT HAVING FRONT AND REAR AND OPPOSITE SIDE WALLS, TWO OF SAID WALLS BEING PARALLEL AND SAID REAR WALL HAVING AN APERTURE THEREIN; AN OPTICAL SYSTEM ON SAID STRUCTURE, INCLUDING A PART EXTERNALLY OF AND A PART WITHIN SAID ELEMENT, FOR TRANSMITTING LIGHT THROUGH SAID APERTURE; A FILM MAGAZINE HAVING INTERIOR UPRIGHT WALLS DEFINING AN OPENING THEREIN DIMENSIONED AND SHAPED TO RECEIVE SAID ELEMENT, AN OPPOSED PAIR OF SAID MAGAZINE WALLS BEING PARALLEL AND SPACED APART ON THE ORDER OF AND COOPERATIVE WITH THE AFORESAID PARALLEL WALLS OF THE ELEMENT TO LOCATE THE MAGAZINE ON THE ELEMENT AND TO PROVIDE FOR SLIDABLE DOWNWARD MOUNTING OF SAID MAGAZINE ON SLIDABLE AND UPWARD REMOVAL THEREOF FROM SAID ELEMENT, SAID MAGAZINE WHEN MOUNTED HAVING A REAR PART CLOSELY BEHIND THE ELEMENT REAR WALL AND FIRST AND SECOND SIDE PARTS RESPECTIVELY AT
References Cited (Backward Citations)
US1073411A
Cited
US1267411A
Cited
US1801061A
Cited
US2080086A
Cited
US2123495A
Cited
US2174660A
Cited
US2624231A
Cited
US2731743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |