US4476181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delaminated vermiculite coated aluminum
Assignee: Imperial Chemical Industries Ltd
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Filing: 1983-03-28
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Granted: 1984-10-09
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Expires: 2003-03-28
Abstract
Abstract An aluminum substrate comprising a layer of lamellae of a layer mineral, preferably vermiculite, in which substantially all of the lamellae are of size below 50 microns, production of the coating by applying a suspension of the lamellae to the substrate and removing the liquid from the suspension. The coating significantly upgrades the thermal insulation and fire performance of aluminum substrates even when only a few microns, for example below 50 microns and even below 10 microns, in thickness.
Inventors
- 👤 Peter J. Briggs
- 👤 Kevin McAloon
- 👤 Graham R. Rideal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:43
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B30/00; C04B41/45; C04B41/50; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J9/236; C09; C09D; C09D1/00; C09D5/00; C09D5/18; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
An article which comprises a coated aluminum substrate characterized in that the coating consists essentially of an inorganic layer of chemically delaminated vermiculite in which the lamellae have a thickness of less than 0.5 micron and an aspect ratio of at least 100, and substantially all of the lamellae are of a size below 50 microns.
Claim 2
Dependent Claim
56 words
An article which comprises a coated aluminum substrate characterized in that the coating consists essentially of an inorganic layer of chemically delaminated vermiculite in which the lamellae have a thickness of less than 0.5 micron and an aspect ratio of at least 100, and substantially all of the lamellae are of a size below 50 microns.
Claim 3
Dependent Claim
18 words
An article as claimed in claim 1 in which the coating is of a thickness below 50 microns.
Claim 4
Dependent Claim
18 words
An article as claimed in claim 1 in which the coating is of a thickness below 10 microns.
Claim 5
Dependent Claim
31 words
An article as claimed in claim 1 in which the coating comprises at least 35% by weight based on the coating of lamellae of size from 0.4 micron to 5 microns.
Claim 6
Dependent Claim
18 words
An article as claimed in claim 1 in which the vermiculite lamellae thickness is less than 0.05 micron.
Claim 7
Dependent Claim
18 words
An article as claimed in claim 5 in which the vermiculite lamellae thickness is less than 0.005 micron.
Claim 8
Dependent Claim
20 words
An article as claimed in claim 1 in which the vermiculite lamellae have an aspect ratio of at least 1,000.
Claim 9
Dependent Claim
27 words
An article as claimed in claim 1 in which the vermiculite lamellae are less than 0.05 micron thick and have an aspect ratio of at least 1,000.
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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) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |