Patent US3783091A successfully refreshed from Google Patents.
US3783091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulphone reinforced silicon elastomer seal
Assignee: Imperial Chemical Industries Ltd
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Filing: 1972-05-08
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Granted: 1974-01-01
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Expires: 1992-05-08
Abstract
Abstract A REINFORCED SEAL IS PROVIDED IN WHICH A SILICONE ELASTOMER AS HEREINAFTER DEFINED IS FORMED ON A RIGID REINFORCEMENT CONTAINING AT LEAST ONE AROMATIC POLYSULPHONE.
Inventors
- 👤 V Leslie
- 👤 M Leggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:23
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1018; C09K3/1012; F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/102; C09K2200/00; C09K2200/06; C09K2200/068; C09K2200/0682; C09K2200/0685; Y; Y10; Y10S; Y10S525/00; Y10S525/906; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |