US4219609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral products
Assignee: Individual
•
Filing: 1978-03-24
•
Granted: 1980-08-26
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Expires: 1998-03-24
Abstract
Abstract A process for the stabilization against water of a vermiculite article and the resultant product. The process consists essentially of contacting the article with the vapor of a nitrogen compound having the formula: ##STR1## where R1, R2 and R3 which may be the same or different are either hydrogen atoms or alkyl groups containing up to seven carbon atoms, provided that where R2 and R3 are both hydrogen atoms, R1 is an alkyl group containing less than three or more than six carbon atoms.
Inventors
- 👤 Colin S. Cundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:06
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B14/00; C04B14/02; C04B14/04; C04B14/20; C04B14/204; C04B20/00; C04B20/10; C04B20/1018; C04B20/1022; C04B20/1055; C04B30/00; C04B41/009; C04B41/45; C04B41/46; C04B41/50; C04B2103/00; C04B2103/0004; C04B2103/0005; C04B2103/60; C04B2103/65; Y; Y10; Y10S; Y10S264/00; Y10S264/80
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A process for the stabilization to water of a vermiculite article consisting essentially of contacting the article with the vapor of a nitrogen compound having the formula: ##STR5## where R1, R2 and R3 which may be the same or different are either hydrogen atoms or alkyl groups containing up to seven carbon atoms, provided that where R2 and R3 are both hydrogen atoms, R1 is an alkyl group containing less than three or seven carbon atoms.
Claim 2
Dependent Claim
76 words
A process for the stabilization to water of a vermiculite article consisting essentially of contacting the article with the vapor of a nitrogen compound having the formula: ##STR5## where R1, R2 and R3 which may be the same or different are either hydrogen atoms or alkyl groups containing up to seven carbon atoms, provided that where R2 and R3 are both hydrogen atoms, R1 is an alkyl group containing less than three or seven carbon atoms.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 wherein the the said alkyl contain up to five carbon atoms.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 1 conducted at a temperature from ambient to 200° C.
Claim 5
Dependent Claim
21 words
A process as claimed in claim 1 wherein the article treated with the nitrogen compound is a rigid form of vermiculite.
Claim 6
Dependent Claim
16 words
An article composed of vermiculite stabilized to water by a process as claimed in claim 1.
Claim 7
Dependent Claim
22 words
A process for the stabilisation to water of a vermiculite article consisting essentially of contacting the article with the vapor of ammonia.
Claim 8
Dependent Claim
22 words
A process for the stabilisation to water of a vermiculite article consisting essentially of contacting the article with the vapor of ammonia.
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) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |