US2551360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of subjecting effervescent materials to an electric field
Assignee: RCA Corp
•
Filing: 1946-01-31
•
Granted: 1951-05-01
•
Expires: 1966-01-31
Abstract
No abstract record available.
Inventors
- 👤 Rudolph A Bierwirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:23
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/04; Y; Y10; Y10S; Y10S159/00; Y10S159/11; Y10S159/16; Y10S159/26
Claims Analysis
Total Claims: 0
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US2459622A
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US2459623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |