Patent US2820699A successfully refreshed from Google Patents.
US2820699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-foaming material
Assignee: Individual
•
Filing: 1954-04-30
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Granted: 1958-01-21
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Expires: 1974-04-30
Abstract
No abstract record available.
Inventors
- 👤 George M Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:40
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/002; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/176152
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS OF MINIMIZING THE PRODUCTION OF FOAM IN THE KJELDAHL NITROGEN DETERMINATION COMPRISING THE STEP OF ADDING THERETO A POLYETHYLENE SOLUBLE IN THE KJELDAHL REAGENTS.
Claim 2
Dependent Claim
26 words
A PROCESS OF MINIMIZING THE PRODUCTION OF FOAM IN THE KJELDAHL NITROGEN DETERMINATION COMPRISING THE STEP OF ADDING THERETO A POLYETHYLENE SOLUBLE IN THE KJELDAHL REAGENTS.
References Cited (Backward Citations)
US2609344A
Cited
US2700461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |