Patent US1174840A successfully refreshed from Google Patents.
US3090931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide elbow
Assignee: AT&T Inc
•
Filing: 1962-03-08
•
Granted: 1963-05-21
•
Expires: 1982-03-08
Abstract
No abstract record available.
Inventors
- 👤 Enrique A J Marcatili
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:33
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/262; G02B6/28; G02B6/2804; G02B6/2817; H; H01; H01P; H01P1/00; H01P1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A GUIDED WAVE TRANSMISSION SYSTEM SUPPORTIVE OF WAVE ENERGY IN A FIRST PREFERRED MODE OF WAVE PROPAGATION AND IN AT LEAST A SECOND, HIGHER ORDER MODE OF WAVE PROPAGATION; AN ELBOW FOR CHANGING THE DIRECTION OF PROPAGATION OF SAID WAVE ENERGY FROM A FIRST DIRECTION OF PROPAGATION TO A SECOND DIRECTION OF PROPAGATION COMPRISING; A PAIR OF TAPERED TRANSITION SECTIONS WHOSE AXES INTERSECT AND WHOSE CROSS-SECTIONAL DIMENSIONS INCREASE
Claim 2
Dependent Claim
69 words
IN A GUIDED WAVE TRANSMISSION SYSTEM SUPPORTIVE OF WAVE ENERGY IN A FIRST PREFERRED MODE OF WAVE PROPAGATION AND IN AT LEAST A SECOND, HIGHER ORDER MODE OF WAVE PROPAGATION; AN ELBOW FOR CHANGING THE DIRECTION OF PROPAGATION OF SAID WAVE ENERGY FROM A FIRST DIRECTION OF PROPAGATION TO A SECOND DIRECTION OF PROPAGATION COMPRISING; A PAIR OF TAPERED TRANSITION SECTIONS WHOSE AXES INTERSECT AND WHOSE CROSS-SECTIONAL DIMENSIONS INCREASE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |