US3250667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of microorganisms with acrolein
Assignee: Shell USA Inc
•
Filing: 1961-05-15
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Granted: 1966-05-10
•
Expires: 1981-05-15
Abstract
No abstract record available.
Inventors
- 👤 Legator Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:47
CPC Classifications
A; A01; A01N; A01N35/00; A01N35/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METHOD FOR COMBATTING SLIME-FORMING AND CORROSION-PROMOTING MICROORGANISMS IN THE AQUEOUS SYSTEM OF A PAPER-MANUFACTURING PLANT, SAID METHOD COMPRISING MAINTAINING IN THAT PART OF SAID AQUEOUS SYSTEM IN WHICH RECYCLED WHITE WATER IS PRESENT AN EFFECTIVE CONCENTRATION OF ACROLEIN AMOUNTING TO AT LEAST 0.1 BUT NOT EXCEEDING 1.5 PARTS PER MILLION BY WEIGHT OF THE AQUEOUS SYSTEM.
Claim 2
Independent Claim
57 words
A METHOD FOR COMBATTING SLIME-FORMING AND CORROSION-PROMOTING MICROORGANISMS IN THE AQUEOUS SYSTEM OF A PAPER-MANUFACTURING PLANT, SAID METHOD COMPRISING MAINTAINING IN THAT PART OF SAID AQUEOUS SYSTEM IN WHICH RECYCLED WHITE WATER IS PRESENT AN EFFECTIVE CONCENTRATION OF ACROLEIN AMOUNTING TO AT LEAST 0.1 BUT NOT EXCEEDING 1.5 PARTS PER MILLION BY WEIGHT OF THE AQUEOUS SYSTEM.
References Cited (Backward Citations)
US2801216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |