Device for routing light among a set of optical waveguides
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 11, 2017
Issued Date -
N/A
app pub date -
Dec 27, 2013
filing date -
Dec 27, 2013
priority date (Note) -
In Force
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Abstract
Light streams are routed. A transparent plate can be provided in which at least 2 waveguides converge on an active region, wherein the active region comprises a switching element, which can be utilized to extract a portion of the light stream or combine two or more wavelength portions for form a subsequent light stream. Cladding material constrains a light stream to a waveguide. Ion bombardment can be utilized to form micropores in the cladding material, and subsequent etching can enlarge the micropores to form larger diameter pores (of nanometer scale) in the switching element. The pores can be filled with liquid crystal, which can be in a passive state with a first refractive (RI) index, and a second active state (electrical voltage applied) with a second RI. By adjusting the RI. the light stream can be diverted by operations of refraction, diffraction, reflection, etc.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
CITY UNIVERSITY OF HONG KONG | KOWLOON |
International Classification(s)

- 2013 Application Filing Year
- G02B Class
- 6559 Applications Filed
- 5896 Patents Issued To-Date
- 89.90 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Chan, Hau Ping | New Territories, HK | 3 | 1 |
# of filed Patents : 3 Total Citations : 1 | |||
Ho, Wing Fat | New Territories, HK | 1 | 1 |
# of filed Patents : 1 Total Citations : 1 | |||
Tsvetkov, Valentine A | Moscow, RU | 1 | 1 |
# of filed Patents : 1 Total Citations : 1 |
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Patent Citation Ranking
- 0 Citation Count
- G02B Class
- 0 % this patent is cited more than
- 8 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 11, 2029 |
Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
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Sep 05, 2022 | AS | ASSIGNMENT | free format text: CHANGE OF NAME;ASSIGNOR:MANDO CORPORATION;REEL/FRAME:062206/0260 Owner name: HL MANDO CORPORATION, KOREA, REPUBLIC OF Effective Date: Sep 05, 2022 |
Jun 06, 2022 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 8 |
May 24, 2018 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551) year of fee payment: 4 |
Mar 10, 2015 | I | Issuance | |
Feb 18, 2015 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Dec 04, 2014 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Oct 03, 2013 | P | Published | |
Mar 29, 2013 | F | Filing | |
Mar 28, 2013 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIM, DONG KEUN;REEL/FRAME:030116/0924 Owner name: MANDO CORPORATION, KOREA, REPUBLIC OF Effective Date: Mar 28, 2013 |
Mar 29, 2012 | PD | Priority Date |

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