US2577520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio-frequency transponder
Assignee: Individual
•
Filing: 1945-07-09
•
Granted: 1951-12-04
•
Expires: 1965-07-09
Abstract
No abstract record available.
Inventors
- 👤 Donald G C Hare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:52
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/82; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5199
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21955E
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US2433782A
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US2378604A
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GB551472A
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US2317547A
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US2400309A
Cited
US2369268A
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US2412991A
Cited
US2363583A
Cited
US2433804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |