US2434143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supersonic signal transmitter and receiver
Assignee: Individual
•
Filing: 1943-09-25
•
Granted: 1948-01-06
•
Expires: 1963-09-25
Abstract
No abstract record available.
Inventors
- 👤 Chilowsky Constantin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:02
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/0674; H; H10; H10N; H10N30/00; H10N30/01; H10N30/09; H10N30/092; H10N30/80; H10N30/85; H10N30/852
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1471547A
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US1830328A
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US1788405A
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DE476506C
Cited
US2009451A
Cited
US2105010A
Cited
US2086891A
Cited
US2233992A
Cited
US2283285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |