Patent US1776154A successfully refreshed from Google Patents.
US1776154A
Expired / Lapsed
US
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Di-isopropyl carbonyl compounds
Assignee: Winthrop Chemical Co Inc
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Filing: 1928-07-05
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Granted: 1930-09-16
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Expires: 1948-07-05
Abstract
No abstract record available.
Inventors
- 👤 Knorr Angelo
- 👤 Weissenborn Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:55
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C45/49; C07C45/61; C07C45/67; C07C45/68; C07C47/00; C07C47/52; C07C47/542; C07C47/546; C07C49/00; C07C49/76; C11; C11B; C11B9/00; C11B9/0007; C11B9/0015
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) | 1933-09-15 | 1934-03-17 | 1934-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-09-15 | 1938-03-17 | 1938-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-09-15 | 1942-03-17 | 1942-09-16 | $7700.00 | Window Closed / Lapsed |