Polycarbonate Resin and Method for Preparing Same
US-2024150521-A1 · May 9, 2024 · US
Copolycarbonate and transparent molded article obtained therefrom
US9018340B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9018340-B2 |
| Application number | US-201214112081-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 13, 2012 |
| Priority date | Apr 19, 2011 |
| Publication date | Apr 28, 2015 |
| Grant date | Apr 28, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A copolycarbonate that is derived from a renewable resource, is excellent in heat resistance, flowability and transparency, and prevented from undergoing a dimensional change by water absorption and coloring during molding as well as a transparent molded article obtained therefrom. The copolycarbonate contains predetermined amounts of a unit (A) constituted of an ether diol residue represented by the formula (1), a unit (B) constituted of a bisphenol residue represented by the formula (2), and a unit (C) constituted of another diol residue, wherein the ratio of terminal groups falls within the ranges of the expressions (i) and (ii).
First claim
Opening claim text (preview).
The invention claimed is: 1. A copolycarbonate comprising a unit (A) constituted of an ether diol residue represented by the following formula (1), a unit (B) constituted of a bisphenol residue represented by the following formula (2), and a unit (C) constituted of another diol residue, wherein (I) the unit (C) is at least one diol residue selected from the group consisting of aliphatic diol residue, alicylic diol residue, oxylene glycol residue and diol residue having a cyclic et…
Assignees
Inventors
Classifications
- C08G64/1608Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C08G64/1691Primary
Chemistry & Metallurgy · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9018340B2 cover?
- A copolycarbonate that is derived from a renewable resource, is excellent in heat resistance, flowability and transparency, and prevented from undergoing a dimensional change by water absorption and coloring during molding as well as a transparent molded article obtained therefrom. The copolycarbonate contains predetermined amounts of a unit (A) constituted of an ether diol residue represented …
- Who is the assignee on this patent?
- Takeda Tsuyoshi, Motoyoshi Tetsuya, Okamoto Hiroshi, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C08G64/1608. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 28 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).