US3713796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens polishing composition containing diamonds in an epoxide resin matrix
Assignee: Eastman Kodak Co
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Filing: 1969-01-02
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Granted: 1973-01-30
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Expires: 1989-01-02
Abstract
Abstract The use of tiny diamonds for finish polishing of glass lenses has been made possible by incorporating them into a lap material comprising very small diamonds in a special polymeric matrix of the reaction product of an organic epoxide with an appropriate ''''hardener,'''' such as a polyamine.
Inventors
- 👤 P Valerio
- 👤 R Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:50
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; B; B24; B24B; B24B13/00; B24B13/01; B24B41/00; B24B41/04; B24B41/047; B24B41/053; B24B7/00; B24B7/20; B24B7/22; B24B7/24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D3/32; B24D3/34; B24D3/342; B24D3/344; B65; B65D; B65D85/00; B65D85/67
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A lap material suitable for finish polishing the surface of glass lenses having improved properties; said lap material containing from about 5 to about 50 weight percent of diamonds having diameters of from about 1 to about 50 microns dispersed through and supported by a solid matrix; said solid matrix consisting essentially of the epoxide resin product of the reaction of (a) an organic epoxide compound having an epoxide equivalent of from about 150 to about 450 with (b) an organic amine hardener; said amine having a molecular weight of at most about 200, and substantially all of said diamonds having diameters below 60 microns, and said epoxide resin product being present in said lap material in an amount equal to at least about 50 weight percent of said lap material.
Claim 2
Dependent Claim
131 words
A lap material suitable for finish polishing the surface of glass lenses having improved properties; said lap material containing from about 5 to about 50 weight percent of diamonds having diameters of from about 1 to about 50 microns dispersed through and supported by a solid matrix; said solid matrix consisting essentially of the epoxide resin product of the reaction of (a) an organic epoxide compound having an epoxide equivalent of from about 150 to about 450 with (b) an organic amine hardener; said amine having a molecular weight of at most about 200, and substantially all of said diamonds having diameters below 60 microns, and said epoxide resin product being present in said lap material in an amount equal to at least about 50 weight percent of said lap material.
Claim 3
Dependent Claim
41 words
A lap material as in claim 1, wherein said lap material also contains gas bubbles dispersed through said matrix; the total volume of said gas being from about 5 to about 50 percent of the unaerated volume of said lap material.
Claim 4
Dependent Claim
31 words
A lap material as in claim 2, wherein said organic epoxide compound has an epoxide equivalent of from about 175 to about 300, and said organic amine is an organic polyamine.
Claim 5
Dependent Claim
15 words
A lap material as in claim 3, wherein said organic polyamine is a polyalkyl polyamine.
Claim 6
Dependent Claim
29 words
A lap material as in claim 4, wherein said organic epoxide material is a modified bisphenol epoxide, containing an average of at least about 1.5 epoxide units per molecule.
Claim 7
Dependent Claim
70 words
A lap material as in claim 5, wherein the average particle size of said diamonds is about 12 microns; said lap material being substantially free of diamonds having diameters greater than 60 microns; the amount of said diamonds in said lap material being from about 10 to about 25 weight percent and the amount of said Gas in said lap material being from about 15 to about 35 volume percent.
Claim 8
Dependent Claim
26 words
A lap material as in claim 2, wherein said lap material also contains from about 0.5 to about 5 weight percent of a silica thickening agent.
Claim 9
Dependent Claim
32 words
A lap material as in claim 3, wherein said lap material contains from about 10 to about 25 weight percent of diamonds having diameters of from about 8 to about 16 microns.
Claim 10
Dependent Claim
57 words
A lap material as in claim 8, wherein said organic epoxide material contains an average of at least about 1.5 epoxide units per molecule and has an epoxide equivalent of from about 150 to about 450, and the amount of said organic polyamine is equal to from about 0.5 to about 1.5 amine groups per epoxide group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |