Patent US2186957A successfully refreshed from Google Patents.
US2186957A
Expired / Lapsed
US
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Coating method
Assignee: Dow Chemical Co
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Filing: 1938-04-13
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Granted: 1940-01-16
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Expires: 1958-04-13
Abstract
No abstract record available.
Inventors
- 👤 William R Collings
- 👤 John J Hoeltzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:24
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/08; D21H19/00; D21H19/10; D21H19/14; D21H19/34; D21H5/00; D21H5/0005; D21H5/006; D21H5/0062
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) | 1943-01-15 | 1943-07-17 | 1944-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-15 | 1947-07-17 | 1948-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-15 | 1951-07-17 | 1952-01-16 | $7700.00 | Window Closed / Lapsed |