Patent US2229028A successfully refreshed from Google Patents.
US2229028A
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Zein solution
Assignee: Corn Products Refining Co
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Filing: 1939-07-14
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Granted: 1941-01-21
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Expires: 1959-07-14
Abstract
No abstract record available.
Inventors
- 👤 Oswald C H Sturken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:22
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/22; D21H27/00; D21H27/30; D21H17/02; D21H17/03; D21H17/04; D21H17/05; D21H17/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31761; Y10T428/31768; Y10T428/31772; Y10T428/31775; Y10T428/31844; Y10T428/31848; Y10T428/31851
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-01-21 | 1944-07-22 | 1945-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-21 | 1948-07-22 | 1949-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-21 | 1952-07-22 | 1953-01-21 | $7700.00 | Window Closed / Lapsed |