US2528668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film clip
Assignee: Individual
•
Filing: 1949-04-18
•
Granted: 1950-11-07
•
Expires: 1969-04-18
Abstract
No abstract record available.
Inventors
- 👤 Elmer E Schenkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:59
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321; G03B21/328; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44017; Y10T24/44026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1430805A
Cited
US1672214A
Cited
US1933659A
Cited
US2174049A
Cited
US2151536A
Cited
US2273701A
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 |