LightPath Technologies, Inc.
🏢 View company profile →28Patents
4Active
28Granted
35Portfolio score
Filing activity: Oct 24, 1991 → May 1, 2020 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6765503B1 | Backlighting for computer keyboard | Electricity | 57 | Expired |
| US5936777A | Axially-graded index-based couplers for solar concentrators | Emerging Cross-Sectional Technologies | 32 | Expired |
| US6027672A | Method of producing large polymer optical blanks with predictable axil refractive index profile | Performing Operations; Transporting | 30 | Expired |
| US5689374A | GRIN lens and method of manufacturing | Physics | 28 | Expired |
| US5236486A | Shaped gradient fabrication in lenses by molding from axial gradient | Chemistry; Metallurgy | 28 | Expired |
| US5200858A | Uni-directional gradient index of refraction glasses | Physics | 25 | Expired |
| US6033515A | Use of a laser to fusion-splice optical components of substantially different cross-sectional areas | Physics | 23 | Expired |
| US5917105A | Method of manufacturing a grin lens | Physics | 23 | Expired |
| US6360039B1 | Fabrication of collimators employing optical fibers fusion-spliced to optical elements of substantially larger cross-sectional areas | Physics | 19 | Expired |
| US6352376B1 | Use of a laser to fusion-splice optical components of substantially different cross-sectional areas | Physics | 15 | Expired |
| US5796525A | Quadaxial gradient index lens | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6871978B2 | Computer keyboard backlighting | Electricity | 14 | Expired |
| US5630857A | Process for manufacturing GRIN lenses by melting a series of layers of frits | Physics | 12 | Expired |
| US5617252A | Gradient refractive index lens elements | Physics | 10 | Expired |
| US5459613A | Lead glass composition series for gradient glasses | Physics | 10 | Expired |
| US5815318A | Axially-graded index-based couplers | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5992179A | Process for manufacturing grin lenses | Physics | 6 | Expired |
| US6780274B2 | Fabrication of collimators employing optical fibers fusion-spliced to optical elements of substantially larger cross-section areas | Physics | 6 | Expired |
| US5582626A | Method for making refractive optical elements with graded properties | Physics | 5 | Expired |
| US6217698A | Use of a laser to fusion-splice optical components of substantially different cross-sectional areas | Physics | 4 | Expired |
| US7146075B2 | High-power fused collimator and associated methods | Physics | 4 | Expired |
| US5504623A | Lead glass composition series for gradient glasses | Physics | 2 | Expired |
| US6278656A | Manipulation of acoustic waves using a functionally graded material and process for making the same | Physics | 2 | Expired |
| US6029475A | Batching of molten glass in the production of graded index of refraction glass bodies | Chemistry; Metallurgy | 2 | Expired |
| US10641928B2 | One optical design pattern/method of a cost effective IR lens | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.