US3822181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making fibrous substrates that contain air containing microcapsules that have inorganic pigments incorporated in their structure
Assignee: Champion International Corp
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Filing: 1972-04-20
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Granted: 1974-07-02
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Expires: 1992-04-20
Abstract
Abstract OPACIFIERS COMPRISING AIR-CONTAINING MICROCAPSULES, HAVING AN AVERAGE PARTICLE DIAMETER BELOW ABOUT 2 MICRONS WITH PIGMENT PARTICLES INCORPORATED IN THE MICROCAPSULAR STRUCTURE PROVIDED HIGHLY OPAQUE SURFACES WHEN INCORPORATED INTO FIBROUS SUBSTRATES. THE OPACIFIERS ARE PRODUCED BY HEATING LIQUID-CONTAINING PRECURSOR MICROCAPULES, WHICH CONTAIN THE PIGMENT PARTICLES IN THEIR STRUCTURE, AT TEMPERATURES SUFFICIENT TO EXPEL THE LIQUID AND PROVIDE AIR IN THE MICROCAPSULES.
Inventors
- 👤 A Vassiliades
- 👤 E Nauman
- 👤 S Shroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:02
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/42; B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/08; B29; B29D; B29D7/00; B29D7/01; D21H19/385; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987; Y10T428/2989
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |