US2351683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of calcium carbonate-adhesive coatings
Assignee: Wyandotte Chemicals Corp
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Filing: 1940-10-12
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Granted: 1944-06-20
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Expires: 1960-10-12
Abstract
No abstract record available.
Inventors
- 👤 Ausker E Hughes
- 👤 Harold B Browne
- 👤 Howard F Roderick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:46
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/50; C; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/80
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) | 1947-06-20 | 1947-12-20 | 1948-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-06-20 | 1951-12-20 | 1952-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-06-20 | 1955-12-20 | 1956-06-20 | $7700.00 | Window Closed / Lapsed |