US2248293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound record film
Assignee: RECORDGRAPH Corp
•
Filing: 1940-01-03
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Granted: 1941-07-08
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Expires: 1960-01-03
Abstract
No abstract record available.
Inventors
- 👤 William L Woolf
- 👤 Edgard L Steed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:12
CPC Classifications
G; G03; G03B; G03B31/00; Y; Y10; Y10T; Y10T24/00; Y10T24/47; Y10T24/4709
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-07-07 | 1945-01-06 | 1945-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-07 | 1949-01-06 | 1949-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-07 | 1953-01-06 | 1953-07-08 | $7700.00 | Window Closed / Lapsed |