US1987572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making ammonium chloride
Assignee: Dow Chemical Co
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Filing: 1933-07-03
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Granted: 1935-01-08
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Expires: 1953-07-03
Abstract
No abstract record available.
Inventors
- 👤 Sheldon B Heath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:10
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1812; B01J19/1837; B01J8/00; B01J8/0015; B01J8/003; C; C01; C01C; C01C1/00; C01C1/16; C01C1/164; B01J2208/00; B01J2208/00743; B01J2208/00761
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) | 1938-01-07 | 1938-07-09 | 1939-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-07 | 1942-07-09 | 1943-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-07 | 1946-07-09 | 1947-01-08 | $7700.00 | Window Closed / Lapsed |