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US2523908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film holder
Assignee: Rudman & Scofield Inc
•
Filing: 1947-09-03
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Granted: 1950-09-26
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Expires: 1967-09-03
Abstract
No abstract record available.
Inventors
- 👤 William B Johnsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:38
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US902940A
Cited
GB190210610A
Cited
GB190317722A
Cited
AT83240B
Cited
US1364230A
Cited
US1347620A
Cited
US1858576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |