Patent US3029140A successfully refreshed from Google Patents.
US3029140A
Expired / Lapsed
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Enhancing the phosphorus uptake from plant growth by use of phosphonic acid
Assignee: Dow Chemical Co
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Filing: 1958-10-13
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Granted: 1962-04-10
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Expires: 1978-10-13
Abstract
No abstract record available.
Inventors
- 👤 John B Hemwall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:03
CPC Classifications
C; C05; C05G; C05G3/00; C05G3/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A METHOD FOR ENHANCING THE PHOSPHORUS UPTAKE FROM PLANT GROWTH MEDIUM BY PLANTS WHICH COMPRISES DISPERSING THROUGH SAID GROWTH MEDIUM A PHOSPHONIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) )1,4-PIPERAZINYLENEDIMETHYLENE)-DIPHOSPHONIC ACID; (2) A COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Independent Claim
40 words
A METHOD FOR ENHANCING THE PHOSPHORUS UPTAKE FROM PLANT GROWTH MEDIUM BY PLANTS WHICH COMPRISES DISPERSING THROUGH SAID GROWTH MEDIUM A PHOSPHONIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) )1,4-PIPERAZINYLENEDIMETHYLENE)-DIPHOSPHONIC ACID; (2) A COMPOUND REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
US2959590A
Cited
US2706194A
Cited
US2714064A
Cited
US2841486A
Cited
US2843617A
Cited
US2870190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |