US2835889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single side band communication system using mechanical filters
Assignee: Collins Radio Co
•
Filing: 1953-03-04
•
Granted: 1958-05-20
•
Expires: 1973-03-04
Abstract
No abstract record available.
Inventors
- 👤 Franklin C Dyer
- 👤 Fletcher J Maclary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:00
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2501488A
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US2578452A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |