Patent US2759871A successfully refreshed from Google Patents.
US2759871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defoaming process
Assignee: —
•
Filing: —
•
Granted: 1956-08-21
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Expires: 1973-08-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:26
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; Y; Y10; Y10S; Y10S435/00; Y10S435/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
IN THE PROCESS OF PRODUCING CHEMICALS BY THE DEEP CULTURE, AERATED FERMENTATION METHOD, THE STEP OF ABATING AND REDUCING FOAM THEREIN WHICH COMPRISES INTRODUCING DEFOAMER AGENT SUBSTANTIALLY BELOW THE SURFACE OF THE MEDIUM AS AN AEROSOL IN A STREAM OF NON-TOXIC GAS.
Claim 2
Dependent Claim
42 words
IN THE PROCESS OF PRODUCING CHEMICALS BY THE DEEP CULTURE, AERATED FERMENTATION METHOD, THE STEP OF ABATING AND REDUCING FOAM THEREIN WHICH COMPRISES INTRODUCING DEFOAMER AGENT SUBSTANTIALLY BELOW THE SURFACE OF THE MEDIUM AS AN AEROSOL IN A STREAM OF NON-TOXIC GAS.
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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |