Patent US2889349A successfully refreshed from Google Patents.
US2889349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosiloxy aryl phosphonates
Assignee: Imperial Chemical Industries Ltd
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Filing: 1956-09-07
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Granted: 1959-06-02
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Expires: 1976-09-07
Abstract
No abstract record available.
Inventors
- 👤 Garden William David
- 👤 Thompson James Mcallan Cormack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:12
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
SILICON-CONTAINING COMPOUNDS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
SILICON-CONTAINING COMPOUNDS HAVING THE GENERAL FORMULA
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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |