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Patent US2232241A successfully refreshed from Google Patents.
US2232241A
Expired / Lapsed
US
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Method of producing ammonium sulphamate
Assignee: Wyeth Holdings LLC
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Filing: 1939-12-09
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Granted: 1941-02-18
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Expires: 1959-12-09
Abstract
No abstract record available.
Inventors
- 👤 Louis C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:32
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)
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) | 1944-02-18 | 1944-08-19 | 1945-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-18 | 1948-08-19 | 1949-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-18 | 1952-08-19 | 1953-02-18 | $7700.00 | Window Closed / Lapsed |