Patent US3487340A successfully refreshed from Google Patents.
US3487340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holder for mounting elements within a waveguide
Assignee: AT&T Inc
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Filing: 1968-08-09
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Granted: 1969-12-30
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Expires: 1988-08-09
Abstract
No abstract record available.
Inventors
- 👤 Hazen Curtis
- 👤 Gerd A Tuchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:50
CPC Classifications
H; H01; H01P; H01P1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3421116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |