US3052594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slimicides
Assignee: Shell USA Inc
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Filing: 1960-03-30
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Granted: 1962-09-04
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Expires: 1980-03-30
Abstract
No abstract record available.
Inventors
- 👤 Marion A Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:34
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50; D; D21; D21C; D21C9/00; D21C9/008
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
IN THE PREPARATION OF PAPER FROM PULP COMPRISING ESSENTIALLY THE STEPS OF PREPARING A FIBER SUSPENSION OF PULP, ARRANGING FIBERS IN SAID SUSPENSION INTO A WET WEB AND REMOVING THE FREE WATER FROM SAID WET WEB, THE IMPROVEMENT COMPRISING ADDING A SLIMICIDALLY EFFECTIVE AMOUNT OF AN ACROLEIN DIALIPHATIC ACETAL TO SAID WATER, TO PROVIDE A SLIMICIDALLY EFFECTIVE CONCENTRATION OF SAID ACETAL IN SAID WATER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |