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US2551569A
Expired / Lapsed
US
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Manufacture of ammonium nitrate
Assignee: Chemical Construction Corp
•
Filing: 1947-05-24
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Granted: 1951-05-01
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Expires: 1967-05-24
Abstract
No abstract record available.
Inventors
- 👤 Strelzoff Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:04
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/18; C01C1/185; Y; Y10; Y10S; Y10S159/00; Y10S159/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2217099A
Cited
US2167464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |