Patent US3540855A successfully refreshed from Google Patents.
US3540855A
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Apparatus for acidulating phosphate rock with gaseous hydrogen chloride
Assignee: FERTILIZER INDUSTRIES Inc
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Filing: 1967-07-10
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Granted: 1970-11-17
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Expires: 1987-07-10
Abstract
No abstract record available.
Inventors
- 👤 William P Moore
- 👤 Rob R Macgregor
- 👤 Richard E Ogden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:21
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/234; C01B25/22; C01B33/00; C01B33/20; C01B33/22; C01B33/24; C01B7/00; C01B7/01; C01B7/03; C01F; C01F7/00; C01F7/02; C01F7/16; C01F7/164; C04; C04B; C04B7/00; C04B7/36; C04B7/43; C04B7/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1112211A
Cited
US1292098A
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US1342024A
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US1387170A
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US1945002A
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FR78782E
Cited
US3227429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |