US3298822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making slag-based soil treatment composition comprising plantavailable phosphorus values
Assignee: Individual
•
Filing: 1963-09-24
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Granted: 1967-01-17
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Expires: 1983-09-24
Abstract
No abstract record available.
Inventors
- 👤 William J Arvay
- 👤 Cornelia P Arvay
- 👤 George A Bartholomew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:11
CPC Classifications
C; C05; C05B; C05B13/00; C05B13/02; Y; Y10; Y10S; Y10S75/00; Y10S75/958
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
THE METHOD OF CONVERTING INSOLUBLE PHOSPHORUS IN PHOSPHATE ROCK TO PLANT AVAILABLE PHOSPHORUS WHICH COMPRISES MIXING THE PHOSPHATE ROCK WITH MOLTEN METALLURGICAL SLAG, AND MAINTAINING SAID MIXTURE AT A TEMPERATURE
Claim 2
Independent Claim
30 words
THE METHOD OF CONVERTING INSOLUBLE PHOSPHORUS IN PHOSPHATE ROCK TO PLANT AVAILABLE PHOSPHORUS WHICH COMPRISES MIXING THE PHOSPHATE ROCK WITH MOLTEN METALLURGICAL SLAG, AND MAINTAINING SAID MIXTURE AT A TEMPERATURE
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |