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Patent US3479294A successfully refreshed from Google Patents.
US3479294A
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Boron extractant compositions
Assignee: American Potash and Chemical Corp
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Filing: 1961-06-21
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Granted: 1969-11-18
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Expires: 1981-06-21
Abstract
No abstract record available.
Inventors
- 👤 Friedrich J Weck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:35
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/01; C07C37/055; C07C37/0555; C07C37/11; C07C37/20; C07C39/00; C07C39/24; C07C39/245; C07F; C07F5/00; C07F5/02; C07F5/04; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A COMPOSITION CONSISTING ESSENTIALLY OF A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
10 words
A COMPOSITION CONSISTING ESSENTIALLY OF A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2732406A
Cited
US2792428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |