US2502890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film clip
Assignee: Individual
•
Filing: 1947-02-07
•
Granted: 1950-04-04
•
Expires: 1967-02-07
Abstract
No abstract record available.
Inventors
- 👤 Henry F Ruschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:34
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/08; G03D13/10; Y; Y10; Y10T; Y10T24/00; Y10T24/34; Y10T24/3427; Y10T24/3439; Y10T24/344; Y10T24/3443; Y10T24/44; Y10T24/44017; Y10T24/44026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US562334A
Cited
DE472988C
Cited
DE546937C
Cited
US784070A
Cited
US869774A
Cited
US1891494A
Cited
US2425603A
Cited
US2428511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |