Patent US2303370A successfully refreshed from Google Patents.
US2303370A
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US
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Poly-alkylol ketones and derivatives, and process of making same
Assignee: 3M Co
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Filing: 1939-05-06
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Granted: 1942-12-01
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Expires: 1959-05-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Kugler
- 👤 Howard C Brinker
- 👤 Robert J Mccubbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:45
CPC Classifications
C; C08; C08G; C08G6/00; C08G6/02; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/75; C07C49/00; C07C49/04; C07C49/17
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) | 1945-11-30 | 1946-06-01 | 1946-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-11-30 | 1950-06-01 | 1950-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-11-30 | 1954-06-01 | 1954-12-01 | $7700.00 | Window Closed / Lapsed |