Patent US2087485A successfully refreshed from Google Patents.
Patent USRE29557E successfully refreshed from Google Patents.
USRE29557E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tl3 PSe4 Compound, single crystals, and acousto-optical devices
Assignee: Westinghouse Electric Corp
•
Filing: 1976-08-03
•
Granted: 1978-02-28
•
Expires: 1996-08-03
Abstract
Abstract The compound Tl 3 PSe 4 is disclosed. Non-conducting single crystals of the compound are prepared which have outstanding acousto-optical properties including an exceptionally high acousto-optical figure of merit. The crystals are used in various acousto-optical devices including a display device, a laser modulator, a non-collinear acousto-optic filter, and an acoustic delay line.
Inventors
- 👤 Thelma J. Isaacs
- 👤 Milton S. Gottlieb
- 👤 John D. Feichtner
- 👤 Andrea A. Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:45
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/11; C; C01; C01B; C01B25/00; C30; C30B; C30B11/00; C30B29/00; C30B29/10; C30B29/46; H; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/1068
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
26 words
A compound having the general formula Tl 3 XSe 4 where X is about 50 to about 100% phosphorus and about 0 to about 50% arsenic.
Claim 2
Dependent Claim
26 words
A compound having the general formula Tl 3 XSe 4 where X is about 50 to about 100% phosphorus and about 0 to about 50% arsenic.
Claim 3
Dependent Claim
9 words
A single crystal of the compound of claim 1.
Claim 4
Dependent Claim
14 words
A compound according to claim 1 having the formula Tl 3 PSe 4 .
Claim 5
Dependent Claim
18 words
A biaxial, non-piezoelectric orthorhombic single crystal according to claim 2 having the formula Tl 3 PSe 4 .
Claim 6
Dependent Claim
28 words
A single crystal according to claim 2 which is at least about .[.10 -3 .]. .Iadd.0.05 .Iaddend.cm .[.wide.]. .Iadd.in diameter .Iaddend.and .Iadd.at least about .Iaddend.1 .[.mm.]. .Iadd.cm .Iaddend.long.
Claim 7
Dependent Claim
23 words
A single crystal according to claim 5 which is at least about 0.5 cm in diameter and at least about 1 cm long.
Claim 8
Dependent Claim
12 words
A single crystal according to claim 5 having two parallel optical faces.
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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |