US4569989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting microbial activity with certain bioactive sulfone polymers
Assignee: Dow Chemical Co
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Filing: 1984-12-24
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Granted: 1986-02-11
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Expires: 2004-12-24
Abstract
Abstract A method of inhibiting microbial growth by employing an addition copolymer is disclosed. The addition copolymer consists essentially of an olefin and sulfur dioxide; said olefin containing at least one substituent selected from the group consisting of hydrogen, chloride, and fluoride radicals. These compositions inhibit bacterial growth while functioning as plastic materials and can be used in coatings, packaging, paints, structural members and supports.
Inventors
- 👤 Norman L. Madison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:24
CPC Classifications
C; C08; C08L; C08L81/00; C08L81/06; A; A01; A01N; A01N41/00; A01N41/02; A01N41/10; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22; Y; Y10; Y10S; Y10S525/00; Y10S525/906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
In a method of inhibiting microbial growth in a system by incorporating a biocide, the improvement of employing as the biocide an addition copolymer consisting essentially of at least one mole of a monomeric olefin for each mole of sulfur dioxide; said olefin containing at least one substituent selected from the group consisting of hydrogen, chloride, and fluoride radicals.
Claim 2
Dependent Claim
59 words
In a method of inhibiting microbial growth in a system by incorporating a biocide, the improvement of employing as the biocide an addition copolymer consisting essentially of at least one mole of a monomeric olefin for each mole of sulfur dioxide; said olefin containing at least one substituent selected from the group consisting of hydrogen, chloride, and fluoride radicals.
Claim 3
Dependent Claim
24 words
The method as defined in claim 1 wherein the addition copolymer consists essentially of 1-2 moles of an α-olefin per mole of sulfur dioxide.
Claim 4
Dependent Claim
12 words
The method as defined in claim 2 wherein the olefin is butene.
References Cited (Backward Citations)
US2293023A
Cited
US4179757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |