US3765998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shapable fiber-reinforced low molecular weight polyethylene terephthalate
Assignee: Honeywell International Inc
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Filing: 1971-01-11
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Granted: 1973-10-16
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Expires: 1991-01-11
Abstract
Abstract Glass fiber-reinforced thermoplastic polymer composite sheets are formed using semicrystalline polymers that have their glass transition temperature above room temperature and may be cold formed, i.e., shaped in a cold mold when preheated outside the mold. Glass-reinforced low molecular weight polyethylene terephthalate, or blends thereof, may be shaped in a cold mold, and exhibit excellent performance.
Inventors
- 👤 P Koch
- 👤 L Segal
- 👤 H Oswald
- 👤 D Prevorsek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
B; B29; B29C; B29C31/00; B29C31/004; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29C51/00; B29C51/14; B29C65/00; B29C65/02; B29C65/14; B29C65/1429; B29C65/1432; B29C65/1445; B29C65/1464; B29C65/1467; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/71; B29C66/72; B29C66/721; B29C66/7212; B29C66/7214; B29C66/72141; B29C66/73; B29C66/731; B29C66/7311; B29C66/73117; B29C66/737; B29C66/7377; B29C66/73773; B29C66/73774; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B32B1/00; B32B27/36; B32B5/00; B32B5/02; B32B5/022; B32B5/22; B32B5/24; B32B5/26; B29C65/1403; B29C65/1412; B29C66/73771; B29C66/73772; B29C66/73775; B29C66/73776; B29K; B29K2105/00; B29K2105/06; B29L; B29L2009/00; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/50; B32B2307/558; B32B2367/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2904; Y10T428/2907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A high impact sheet in accordance with claim 1 wherein the polyethylene terephthalate within the stated molecular weight is derived by degrading a resin having a molecular weight in excess of 45,000.
Claim 2
Dependent Claim
20 words
The sheet of claim 1 which incorporates up to 40 percent, by weight of the total sheet composition, of nylon.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |