US2816174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic compression system
Assignee: RCA Corp
•
Filing: 1952-04-26
•
Granted: 1957-12-10
•
Expires: 1972-04-26
Abstract
No abstract record available.
Inventors
- 👤 Dorothy L Blaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:58
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/00007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US873042A
Cited
US1653467A
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US1846531A
Cited
US1828189A
Cited
CH218407A
Cited
FR882888A
Cited
US2361752A
Cited
US2628287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |