Patent US2097446A successfully refreshed from Google Patents.
US2097446A
Expired / Lapsed
US
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Phosphate-sulphur fertilizer and process of making same
Assignee: Freeport Minerals Co
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Filing: 1935-12-21
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Granted: 1937-11-02
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Expires: 1955-12-21
Abstract
No abstract record available.
Inventors
- 👤 Jr John T Claiborne
- 👤 Paul D Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:24
CPC Classifications
C; C05; C05B; C05B17/00
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) | 1940-11-01 | 1941-05-03 | 1941-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-11-01 | 1945-05-03 | 1945-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-11-01 | 1949-05-03 | 1949-11-02 | $7700.00 | Window Closed / Lapsed |