US3464809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of granular ammonium sulfate
Assignee: Tennessee Valley Authority
•
Filing: 1966-07-14
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Granted: 1969-09-02
•
Expires: 1986-07-14
Abstract
No abstract record available.
Inventors
- 👤 Gordon C Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:25
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/24; C01C1/242; C05; C05C; C05C3/00; C05C3/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2047393A
Cited
US3351455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |