Photochromic resin lens with refractivity of 1.50 and preparation method thereof

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12060447
SERIAL NO

17243339

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The present invention discloses a photochromic resin lens with a refractivity of 1.50 and a preparation method thereof. The lens comprises a resin monomer, a photochromic organic material, an initiator, an antioxidant and a photo stabilizer at a weight ratio of 100:0.01-0.1:1-10:0.1-0.9:0.1-0.9. The resin monomer is a mixture of a monofunctional acrylate, a difunctional acrylate and a tetrafunctional acrylate at a weight ratio of 10-80:10-50:10-50. In the present invention, a low-refractivity photochromic resin lens with a refractivity of 1.50 and an Abbe number of 58 is prepared. The lens does not contain toxic materials, is safer and more environmentally friendly to wear and produce, and has high Abbe number, clear imaging, high visible light transmittance, and high product pass rate. The visible light transmittance under UV irradiation is less than 20%, the color is deep, and the photochromic effect is good.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
SHANGHAI CONANT OPTICAL CO LTD201299 BUILDING 1 3-8 13-15 555 585 CHUANDA ROAD PUDONG NEW AREA SHANGHAI SHANGHAI CITY SHANGHAI CITY 201299
JIANGSU CONANT OPTICAL CO LTD18 JIANGFENG ROAD BINHAI INDUSTRIAL PARK QIDONG NANTONG 226236

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Huang, Tianniao Nantong, CN 3 0
Li, Yang Nantong, CN 1182 7549
Wang, Chuanbao Nantong, CN 24 18
Yan, Qingbo Nantong, CN 11 0

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Feb 13, 2028
7.5 Year Payment $3600.00 $1800.00 $900.00 Feb 13, 2032
11.5 Year Payment $7400.00 $3700.00 $1850.00 Feb 13, 2036
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
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