US2313672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating sand mold surfaces
Assignee: Hexion Inc
•
Filing: 1941-08-06
•
Granted: 1943-03-09
•
Expires: 1961-08-06
Abstract
No abstract record available.
Inventors
- 👤 Harold K Salzberg
- 👤 Walter B Kinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:17
CPC Classifications
B; B22; B22C; B22C3/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31667
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) | 1946-03-08 | 1946-09-07 | 1947-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-08 | 1950-09-07 | 1951-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-08 | 1954-09-07 | 1955-03-09 | $7700.00 | Window Closed / Lapsed |