Patent US1899340A successfully refreshed from Google Patents.
US1899340A
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US
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Process of manufacturing aldehydes and the products
Assignee: Winthrop Chemical Co Inc
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Filing: 1931-03-06
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Granted: 1933-02-28
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Expires: 1951-03-06
Abstract
No abstract record available.
Inventors
- 👤 Knorr Angelo
- 👤 Weissenborn Albert
- 👤 Laage Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:00
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/56; C07C45/57; C07C45/58; C07C47/00; C07C47/02; C07C47/105; C07C47/11; C07C47/115; C07C47/20; C07C47/228; C07C47/235; C07C47/24; C07C47/277; C07C47/52; C07C47/546; C07C47/575
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) | 1936-02-28 | 1936-08-29 | 1937-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-28 | 1940-08-29 | 1941-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-28 | 1944-08-29 | 1945-02-28 | $7700.00 | Window Closed / Lapsed |