US3434774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide for millimeter and optical waves
Assignee: AT&T Inc
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Filing: 1965-02-02
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Granted: 1969-03-25
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Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Stewart E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:06
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/036; G02B6/03694; G02B6/03616; G02B6/03638; G02B6/10; H; H01; H01P; H01P3/00; H01P3/16; H01P3/165; G02B6/02057; G02B6/02076; G02B6/0208; G02B6/02085; G02B2006/0209; G02B6/24; G02B6/42; G02B6/4201; G02B6/4202; G02B6/4203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |