US4376899A
Expired / Lapsed
US
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Molecular crystal for non-linear optics
Assignee: Individual
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Filing: 1981-10-08
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Granted: 1983-03-15
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Expires: 2001-10-08
Abstract
Abstract The invention relates to crystals for use in non-linear optics. According to the invention, these crystals are formed by 3 and/or 5-methyl-4-nitropyridine-1-oxide molecules. Application to the conversion of optical frequencies and to electrooptics.
Inventors
- 👤 Dahiel Chemla
- 👤 Joseph Zyss
- 👤 Jean-Francois Nicoud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:53
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3611; G02F1/3612
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
In a process using a molecular crystal in non-linear optics the step of using as the crystal molecules selected from the group consisting of 3-methyl-4-nitro-pyridine-1-oxide, 5-methyl-4-nitropyridine-1-oxide and 3,5-dimethyl-4-nitropyridine-1-oxide.
Claim 2
Dependent Claim
28 words
In a process using a molecular crystal in non-linear optics the step of using as the crystal molecules selected from the group consisting of 3-methyl-4-nitro-pyridine-1-oxide, 5-methyl-4-nitropyridine-1-oxide and 3,5-dimethyl-4-nitropyridine-1-oxide.
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) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |