US2503779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for radio frequency treatment of filamentary material
Assignee: RCA Corp
•
Filing: 1947-08-13
•
Granted: 1950-04-11
•
Expires: 1967-08-13
Abstract
No abstract record available.
Inventors
- 👤 Theodore H Story
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:44
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2308204A
Cited
US2321131A
Cited
US2303983A
Cited
US2288269A
Cited
US2308043A
Cited
US2433067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |