US3697422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intumescent fillers for paints
Assignee: United States Department of the Navy
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Filing: 1970-11-23
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Granted: 1972-10-10
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Expires: 1990-11-23
Abstract
Abstract A CONVENTIONAL ANTI-CORROSION PAINT COMPOSITION CONTAINING A MIXTURE OF MICROSPHERES SOME OF WHICH CONTAIN A FOAMABLE PLASTIC MATERIAL WHILE OTHERS CONTAIN A SPUMIFIC MATERIAL. IN THE EVENT THAT A SURFACE COATED WITH THIS FORMULATION IS EXPOSED TO HEAT, THE MICROSPHERES WILL MELT CAUSING AN INTERMINGLING OF THEIR CONTENTS WHICH WILL PRODUCE GAS. SUCH GAS CAUSES THE OTHER LIQUIDS RELEASED BY THE RUPTURED MICROSPHERES TO SWELL AND FOAM CREATING A NONFLAMMABLE INSULATIVE BARRIER.
Inventors
- 👤 William L Mackie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:49
CPC Classifications
C; C04; C04B; C04B40/00; C04B40/06; C04B40/0633; C09; C09D; C09D5/00; C09D5/18; C09D5/185; Y; Y10; Y10S; Y10S264/00; Y10S264/07; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |