US2819450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molecular resonance modulators and demodulators
Assignee: AT&T Inc
•
Filing: 1955-04-01
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Granted: 1958-01-07
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Expires: 1975-04-01
Abstract
No abstract record available.
Inventors
- 👤 Charles H Townes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:22
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/26; H03C; H03C3/00; H03C3/30; H03C7/00; H03C7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2106770A
Cited
US2423383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |