US3273451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic apparatus
Assignee: Individual
•
Filing: 1963-12-17
•
Granted: 1966-09-20
•
Expires: 1983-12-17
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:51
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
PHOTOGRAPHIC ENLARGER, COMPRISING A LIGHT SOURCE, TUBULAR MEANS DISPOSED TO RECEIVE LIGHT FROM SAID LIGHT SOURCE AT ONE END THEREOF, DIFFUSER MEANS DISPOSED ACROSS SAID ONE END OF SAID TUBULAR MEANS FOR SCATTERING SAID LIGHT INTO SAID TUBULAR MEANS, OPALESCENT MEANS DISPOSED ACROSS THE OTHER END OF SAID TUBULAR MEANS, SAID TUBULAR MEANS FORMING A LIGHT PATH FROM SAID DIFFUSER MEANS TO SAID OPALESCENT MEANS, MEANS FOR SUPPORTING A PHOTOGRAPHIC
Claim 2
Dependent Claim
70 words
PHOTOGRAPHIC ENLARGER, COMPRISING A LIGHT SOURCE, TUBULAR MEANS DISPOSED TO RECEIVE LIGHT FROM SAID LIGHT SOURCE AT ONE END THEREOF, DIFFUSER MEANS DISPOSED ACROSS SAID ONE END OF SAID TUBULAR MEANS FOR SCATTERING SAID LIGHT INTO SAID TUBULAR MEANS, OPALESCENT MEANS DISPOSED ACROSS THE OTHER END OF SAID TUBULAR MEANS, SAID TUBULAR MEANS FORMING A LIGHT PATH FROM SAID DIFFUSER MEANS TO SAID OPALESCENT MEANS, MEANS FOR SUPPORTING A PHOTOGRAPHIC
References Cited (Backward Citations)
US2794365A
Cited
US3077140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |