US3840577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic phosphorosilicon compounds and a process for production thereof
Assignee: Toyama Chemical Co Ltd
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Filing: 1971-07-09
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Granted: 1974-10-08
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Expires: 1991-07-09
Abstract
Abstract 1. AN ORGANIC PHOSPHOROSILICON COMPOUND HAVING THE FORMULA: SI-(O-C(-CH3)2-P(=O)(-O-RI)-O-RII)4 WHEREIN RI AND RII FORM, TAKEN TOGETHER, AN ALKYLENE GROUP HAVING 2 OR 3 CARBON ATOMS OR A HALOGEN-SUBSTITUTED ALKYLENE GROUP HAVING 2 OR 3 CARBON ATOMS, RI AND RII WHEN TAKEN TOGETHER WITH O AND P FORMING A 1,3,2DIOXAPHOSPHOLANE RING.
Inventors
- 👤 Y Kodama
- 👤 T Kodama
- 👤 M Nakabayashi
- 👤 S Komatu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:51
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C08; C08K; C08K5/00; C08K5/54; C08K5/5406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
AN ORGANIC PHOSPHOROSILICON COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
7 words
AN ORGANIC PHOSPHOROSILICON COMPOUND HAVING THE FORMULA:
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |