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Patent US2426420A successfully refreshed from Google Patents.
US2426420A
Expired / Lapsed
US
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Process for producing ammonium sulfamate
Assignee: EIDP Inc
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Filing: 1945-07-19
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Granted: 1947-08-26
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Expires: 1965-07-19
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Tauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:23
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/087; C01B21/093; C01B21/0935; C01B21/096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE668142C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |