Patent US4043971A successfully refreshed from Google Patents.
US4043971A
Expired / Lapsed
US
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Thermoplastic polybutylene terephthalate molding compositions of improved tracking resistance
Assignee: BASF SE
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Filing: 1976-04-21
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Granted: 1977-08-23
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Expires: 1996-04-21
Abstract
Abstract Thermoplastic polybutylene terephthalate molding compositions containing calcium sulfate and/or barium sulfate to increase the tracking resistance.
Inventors
- 👤 Rolf Wurmb
- 👤 Joachim Kunde
- 👤 Johannes Schlag
- 👤 Hans Georg Dorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:45
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/421; H01B3/422; H01B3/423; C; C08; C08K; C08K3/00; C08K3/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
37 words
Molding compositions of polybutylene terephthalate having improved tracking resistance and containing as fillers, CaSO 4 , BaSO 4 or mixtures thereof in amounts of from 5 to 60% by weight of the total weight of the composition.
Claim 2
Dependent Claim
37 words
Molding compositions of polybutylene terephthalate having improved tracking resistance and containing as fillers, CaSO 4 , BaSO 4 or mixtures thereof in amounts of from 5 to 60% by weight of the total weight of the composition.
Claim 3
Dependent Claim
30 words
Molding compositions as claimed in claim 1 and containing CaSO 4 and/or BaSO 4 in amounts of from 10 to 40%, by weight of the total weight of the composition.
Claim 4
Dependent Claim
13 words
Molding compositions as claimed in claim 2 and additionally containing other reinforcing fillers.
Claim 5
Dependent Claim
24 words
Molding compositions as set forth in claim 1 wherein the CaSO 4 or BaSO 4 has a particle size of from 0.5 to 100μm.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |