US3904560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mark-resistant glare-free paint composition
Assignee: 3M Co
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Filing: 1971-10-12
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Granted: 1975-09-09
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Expires: 1991-10-12
Abstract
Abstract Mark-resistant, glare-free coating compositions are provided by using as a flatting agent a mixture of solid and hollow inert noncoalescing microspheres.
Inventors
- 👤 Eugene L Mckenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:29
CPC Classifications
C; C09; C09D; C09D7/00; C09D7/40; C09D7/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
A PAINT COMPOSITION FOR FORMING MARK-RESISTANT GLARE-FREE PAINT FILMS COMPRISING A, A PAINT VEHICLE, AND B. A MIXTURE OF SOLIDS AND HOLLOW INSERT NONCOALESCING MICROSPHERES DISPERSED IN THE VEHICLE AND ADAPTED TO UNIFORMLY AND MINUTELY ROUGHEN THE SURFACE OF AN APPLIED FILM OF THE COMPOSITON TO REDUCE GLARE FROM THE FILM, THE AVERAGE DIAMETER OF THE HOLLOW MICORSPHERES BEING THE SAME AS OR LESS THAN THE AVERAGE DIAMETER OF THE SOLID MICROSPHERES, AND THE VOLUME RATIO OF SOLID TO HOLLOW MICROSPHERES LYING BETWEEN ABOUT 3:1 AND 1:3
Claim 2
Dependent Claim
87 words
A PAINT COMPOSITION FOR FORMING MARK-RESISTANT GLARE-FREE PAINT FILMS COMPRISING A, A PAINT VEHICLE, AND B. A MIXTURE OF SOLIDS AND HOLLOW INSERT NONCOALESCING MICROSPHERES DISPERSED IN THE VEHICLE AND ADAPTED TO UNIFORMLY AND MINUTELY ROUGHEN THE SURFACE OF AN APPLIED FILM OF THE COMPOSITON TO REDUCE GLARE FROM THE FILM, THE AVERAGE DIAMETER OF THE HOLLOW MICORSPHERES BEING THE SAME AS OR LESS THAN THE AVERAGE DIAMETER OF THE SOLID MICROSPHERES, AND THE VOLUME RATIO OF SOLID TO HOLLOW MICROSPHERES LYING BETWEEN ABOUT 3:1 AND 1:3
Claim 3
Dependent Claim
19 words
A composition of claim 1 in which the volume ratio of solid microspheres to hollow microspheres is about 1:1.
Claim 4
Dependent Claim
25 words
A composition of claim 1 in which the average diameter of the solid microspheres is the same as the average diameter of the hollow microspheres.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |