US3386043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric waveguide, maser amplifier and oscillator
Assignee: AT&T Inc
•
Filing: 1964-07-31
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Granted: 1968-05-28
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Enrique A J Marcatili
- 👤 Robert A Schmeltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:02
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/0315; G; G02; G02B; G02B6/00; G02B6/10; H01P; H01P3/00; H01P3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2929034A
Cited
US3016502A
Cited
US3157726A
Cited
US3275956A
Cited
US3275955A
Cited
US3253500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |