Patent US3816355A successfully refreshed from Google Patents.
US3816355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Macroreticular sulfonated pyridine-divinylbenzene resins
Assignee: Rohm and Haas Co
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Filing: 1971-12-06
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Granted: 1974-06-11
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Expires: 1991-12-06
Abstract
Abstract Macroreticular sulfonated, vinyl nitrogen heterocyclic resins are effective adsorbents for SO2 and/or SO3 and also have ionexchange properties. The resins are thus useful in preventing or controlling pollution since they can be used to remove the sulfur oxide contaminants from exit or stack gases from sulfuric acid manufacturing plants, power plants which burn fossile fuels, etc.
Inventors
- 👤 D Clemens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:14
CPC Classifications
C; C08; C08F; C08F26/00; C08F26/06; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01J; B01J41/00; B01J41/04; B01J49/00; B01J49/40; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A resin according to claim 1, wherein the vinylpyridine monomer is 4-vinylpyridine.
Claim 2
Dependent Claim
11 words
A resin according to claim 1, wherein the metal is sodium.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |