Patent US2049332A successfully refreshed from Google Patents.
Patent US3957665A successfully refreshed from Google Patents.
US3957665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of electrically insulating polysulphones
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-07-15
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Granted: 1976-05-18
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Expires: 1994-07-15
Abstract
Abstract New polymeric materials containing sulphone groups in the polymer chain are particularly suitable for moulding to give strong transparent products of high softening point and may be used as electrical insulants in condensers.
Inventors
- 👤 Michael Edward Benet Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:09
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; C; C08; C08G; C08G75/00; C08G75/20; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/307
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A condenser comprising an electrically conductive portion which is electrically insulated by a shaped polysulphone formed of repeating units having the structure --Ar -- SO.sub.2 -- where Ar is a divalent aromatic residue derived from diphenyl or a compound having the structure ##SPC15## where X is --O-- or --S--, and Ar may vary from unit to unit in the polymer chain.
Claim 2
Dependent Claim
61 words
A condenser comprising an electrically conductive portion which is electrically insulated by a shaped polysulphone formed of repeating units having the structure --Ar -- SO.sub.2 -- where Ar is a divalent aromatic residue derived from diphenyl or a compound having the structure ##SPC15## where X is --O-- or --S--, and Ar may vary from unit to unit in the polymer chain.
Claim 3
Dependent Claim
19 words
A condenser according to claim 1, in which the polysulphone is formed of repeating units having the structure ##SPC16##
Claim 4
Dependent Claim
25 words
A condenser according to claim 1 in which the polysulphone is formed of repeating units having the structure ##SPC17## and units having the structure ##SPC18##
Claim 5
Dependent Claim
62 words
An electrical structure comprising an electrically conductive component electrically insulated by a layer of a polysulphone formed of repeating units having the structure --AR -- SO.sub.2 -- where Ar is a divalent aromatic residue derived from diphenyl or a compound having the structure ##SPC19## whre X is --O-- or --S--, and Ar may vary from unit to unit in the polymer chain.
Claim 6
Dependent Claim
62 words
An electrical structure comprising an electrically conductive component electrically insulated by a layer of a polysulphone formed of repeating units having the structure --AR -- SO.sub.2 -- where Ar is a divalent aromatic residue derived from diphenyl or a compound having the structure ##SPC19## whre X is --O-- or --S--, and Ar may vary from unit to unit in the polymer chain.
Claim 7
Dependent Claim
18 words
The structure of claim 4, in which the polysulphone is formed of repeating units having the structure ##SPC20##
Claim 8
Dependent Claim
24 words
The structure of claim 5 in which the polysulphone is formed of repeating units having the structure ##SPC21## and units having the structure ##SPC22##
Claim 9
Dependent Claim
120 words
A condenser comprising an electrically conductive portion which is electrically insulated by a shaped polysulphone formed of repeating units having the structure --Ar -- SO.sub.2 -- where Ar is a divalent aromatic residue derived from benzene, a polynuclear hydrocarbon, diphenyl, a compound having the structure ##SPC23## where P is --O--, --S--, --SO--, a divalent hydrocarbon radical, a residue of a diol containing only carbon atoms or groups of the structure --C--O--C--, and --C--S--C, in the chain between the hydroxyl groups, or substituted derivatives of any such aromatic residues wherein one or more of the hydrogen atoms bound to aromatic rings are substituted by other monovalent atoms or groups, and Ar may vary from unit to unit in the polymer chain.
Claim 10
Dependent Claim
120 words
A condenser comprising an electrically conductive portion which is electrically insulated by a shaped polysulphone formed of repeating units having the structure --Ar -- SO.sub.2 -- where Ar is a divalent aromatic residue derived from benzene, a polynuclear hydrocarbon, diphenyl, a compound having the structure ##SPC23## where P is --O--, --S--, --SO--, a divalent hydrocarbon radical, a residue of a diol containing only carbon atoms or groups of the structure --C--O--C--, and --C--S--C, in the chain between the hydroxyl groups, or substituted derivatives of any such aromatic residues wherein one or more of the hydrogen atoms bound to aromatic rings are substituted by other monovalent atoms or groups, and Ar may vary from unit to unit in the polymer chain.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |