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Patent US3825629A successfully refreshed from Google Patents.
US3825629A
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US
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Benzene phosphonates
Assignee: Sandoz AG
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Filing: 1971-10-20
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Granted: 1974-07-23
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Expires: 1991-10-20
Abstract
Abstract THE PURPOSE OF THE INVENTION ARE NEW BENZENE PHOSPHONIC ACID COMPOUNDS IN WHICH TWO TO FOUR BENZENE NUCLEI ARE BOUND TOGETHER AND WHICH CONTAIN ONE TO THREE PHOSPHORUS ATOMS. THE NEW COMPOUNDS ARE FREE ACIDS, THEIR SALTS WITH INORGANIC CATIONS, THEIR ESTERS, THIOSETERS OR AMIDES. THE INVENTION CONCERNS ALSO THE MANUFACTURES OF THESE BENZENE PHOSPHONIC ACID COMPOUNDS AND THEIR USE FOR THE STABILIZATION OF ORGANIC MATERIALS.
Inventors
- 👤 K Hofer
- 👤 G Tscheulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:25
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/52; C07F9/48; C07F9/4808; C07F9/4841; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5393; C08K5/5398; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/322; C09K15/324; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/929
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |