US3139448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorophenyl substituted di-and trisilaalkanes
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1962-10-31
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Granted: 1964-06-30
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Expires: 1982-10-31
Abstract
No abstract record available.
Inventors
- 👤 Hardy Richard Jonathan
- 👤 Thompson James Mcallan Cormack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:39
CPC Classifications
C; C10; C10M; C10M3/00; C10M2227/00; C10M2227/04; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
1-(2,3,5,6)-TETRACHLOROPHENYL-3-PHENYL TETRAMETHYL DISILMETHYLENE. 2. 3 - (2,3,5,6 - TETRACHLOROPHENYL - 1,1,3,5,5 - PENTAMETHYL-1,5-DIPHENYL-1,3,5-TRISILA-N-PENTANE.
Claim 2
Dependent Claim
13 words
1-(2,3,5,6)-TETRACHLOROPHENYL-3-PHENYL TETRAMETHYL DISILMETHYLENE. 2. 3 - (2,3,5,6 - TETRACHLOROPHENYL - 1,1,3,5,5 - PENTAMETHYL-1,5-DIPHENYL-1,3,5-TRISILA-N-PENTANE.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |