US3655564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-repellant thermal insulating composition
Assignee: INSUL FIL Manufacturing CO
•
Filing: 1968-05-09
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Granted: 1972-04-11
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Expires: 1988-05-09
Abstract
Abstract A mixture of hydrophobically coated expanded perlite particles of a particular size with particles of a particular and different size having a hydrophobic surface, which mixture functions as a water-repellant thermal insulation.
Inventors
- 👤 Jonathan Barrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:54
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2625512A
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US3149030A
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US3015626A
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US3166511A
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US3169927A
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US3313321A
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US3421328A
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US3445253A
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US3418399A
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US3473339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |