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Patent US3472939A successfully refreshed from Google Patents.
US3472939A
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US
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Synergistic blends of microbiocidal quaternary ammonium compounds
Assignee: Stepan Co
•
Filing: 1967-12-06
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Granted: 1969-10-14
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Expires: 1987-12-06
Abstract
No abstract record available.
Inventors
- 👤 Alfonso N Petrocci
- 👤 Kenneth W Prodo
- 👤 Edward G Shay
- 👤 Reginald L Wakeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:37
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2692231A
Cited
US2700683A
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US3140976A
Cited
US3247058A
Cited
US3349033A
Cited
US3285959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |