US4174428A
Expired / Lapsed
US
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Heavy metal ion adsorbents
Assignee: Individual
•
Filing: 1978-01-30
•
Granted: 1979-11-13
•
Expires: 1998-01-30
Abstract
Abstract A heavy metal ion adsorbent represented by the following general formula: <IMAGE> wherein l, m, and n are 2 or 3, respectively; R is an alkyl group containing 4 to 6 carbon atoms which is substituted by an amino group in the omega -position; and A is hydrogen or a synthetic resin.
Inventors
- 👤 Iwao Tabushi
- 👤 Hidefumi Kato
- 👤 Yoichi Taniguchi
- 👤 Yasuhisa Kuroda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:14
CPC Classifications
C; C07; C07C; C07C255/00; C07D; C07D257/00; C07D257/02; C08; C08F; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
47 words
A heavy metal ion absorbent represented by the formula: ##STR12## wherein l, m and n are 2 or 3, respectively; R is an alkyl group containing 4 to 6 carbon atoms which is substituted by an amino group in the ω-position; and A is hydrogen or polystyrene.
Claim 2
Dependent Claim
47 words
A heavy metal ion absorbent represented by the formula: ##STR12## wherein l, m and n are 2 or 3, respectively; R is an alkyl group containing 4 to 6 carbon atoms which is substituted by an amino group in the ω-position; and A is hydrogen or polystyrene.
Claim 3
Dependent Claim
16 words
The heavy metal ion adsorbent according to claim 1, which is represented by the formula: ##STR13##
Claim 4
Dependent Claim
16 words
The heavy metal ion adsorbent according to claim 1, which is represented by the formula: ##STR14##
Claim 5
Dependent Claim
16 words
The heavy metal ion adsorbent according to claim 1, which is represented by the formula: ##STR15##
Claim 6
Dependent Claim
20 words
The heavy metal ion adsorbent according to claim 1, which is represented by the formula: ##STR16## wherein (PS) is polystyrene.
Claim 7
Dependent Claim
20 words
The heavy metal ion adsorbent according to claim 1, which is represented by the formula: ##STR17## wherein (PS) is polystyrene.
Claim 8
Dependent Claim
20 words
The heavy metal ion adsorbent according to claim 1, which is represented by the formula: ##STR18## wherein (PS) is polystyrene.
Claim 9
Dependent Claim
13 words
The heavy metal ion adsorbent according to claim 1, wherein A is hydrogen.
Claim 10
Dependent Claim
13 words
The heavy metal ion adsorbent according to claim 1, wherein A is polystyrene.
Claim 11
Dependent Claim
13 words
The heavy metal ion adsorbent according to claim 1, wherein l equals n.
Claim 12
Dependent Claim
23 words
The heavy metal ion adsorbent according to claim 1, wherein the nitrogen and carbon containing ring contains a total of 13 ring atoms.
Claim 13
Dependent Claim
23 words
The heavy metal ion adsorbent according to claim 1, wherein the nitrogen and carbon containing ring contains a total of 14 ring atoms.
Claim 14
Dependent Claim
23 words
The heavy metal ion adsorbent according to claim 1, wherein the nitrogen and carbon containing ring contains a total of 15 ring atoms.
Claim 15
Dependent Claim
23 words
The heavy metal ion adsorbent according to claim 1, wherein the nitrogen and carbon containing ring contains a total of 16 ring atoms.
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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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |