Patent US3954847A successfully refreshed from Google Patents.
US3954847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New benzene phosphonous acid compounds, their production and use as stabilizers for organic materials
Assignee: Sandoz AG
•
Filing: 1974-04-25
•
Granted: 1976-05-04
•
Expires: 1994-04-25
Abstract
Abstract The purpose of the invention are new benzene phosphonous 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, thioesters or amides. The invention concerns also the manufacture of these benzene phosphonous acid compounds and their use for the stabilization of organic materials.
Inventors
- 👤 Kurt Hofer
- 👤 Guenther Tscheulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:47
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/322; C09K15/324; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/48; C07F9/4808; C07F9/4841; C07F9/50; C07F9/52; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5393
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
A compound of the formula ##SPC14## wherein Y is oxygen or sulphur and n is 1 or 2, or the sodium, potassium, barium or calcium salt thereof.
Claim 2
Dependent Claim
27 words
A compound of the formula ##SPC14## wherein Y is oxygen or sulphur and n is 1 or 2, or the sodium, potassium, barium or calcium salt thereof.
Claim 3
Dependent Claim
17 words
A compound of the formula defined in claim 1 which is the barium or calcium salt thereof.
Claim 4
Dependent Claim
10 words
A compound according to claim 1 of the formula ##SPC15##
Claim 5
Dependent Claim
15 words
A compound of claim 1, of the formula ##SPC16## wherein n is 1 or 2.
Claim 6
Dependent Claim
9 words
A compound of claim 4, wherein n is 1.
Claim 7
Dependent Claim
9 words
A compound of claim 5, of the formula ##SPC17##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |