US2528855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in association with two picture projector machines
Assignee: CADWELL Corp
•
Filing: 1949-05-16
•
Granted: 1950-11-07
•
Expires: 1969-05-16
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Cadwell
- 👤 Frank M Adamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:56
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; G03B19/26; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/1828
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US887839A
Cited
US947471A
Cited
US1060128A
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US941752A
Cited
US1257986A
Cited
US2297532A
Cited
US2401506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |