US4293615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl butyral laminates
Assignee: EIDP Inc
•
Filing: 1980-05-30
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Granted: 1981-10-06
•
Expires: 2000-05-30
Abstract
Abstract Laminates of glazing material and polyvinyl butyral plasticized with propylene oxide oligomers.
Inventors
- 👤 Griffith Bowen
- 👤 Peter A. Fowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10605; B32B17/10761; C08L; C08L29/00; C08L29/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31627; Y10T428/3163; Y10T428/31855; Y10T428/31859; Y10T428/31935; Y10T428/31942; Y10T428/31946
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
A laminar structure comprising at least one layer of glazing material and a sheet of plasticized polyvinyl butyral having a hydroxyl content of about from 15 to 30% by weight, calculated as vinyl alcohol, and, in compatible admixture therewith, about from 10 to 70 parts per hundred parts by weight of at least one propylene oxide oligomer of the general formula ##STR9## wherein R is a linear or a branched aliphatic, cycloaliphatic, aralkyl, aromatic, alkoxy alkyl or heterocyclic radical of 1 to 14 carbon atoms, n is an integer of 1 to 30 and has an average value of about from 1 to 20, and m is an integer of from 1 to 3 wherein the average molecular weight of the propylene oxide oligomers is about from 300 to 2500.
Claim 2
Dependent Claim
130 words
A laminar structure comprising at least one layer of glazing material and a sheet of plasticized polyvinyl butyral having a hydroxyl content of about from 15 to 30% by weight, calculated as vinyl alcohol, and, in compatible admixture therewith, about from 10 to 70 parts per hundred parts by weight of at least one propylene oxide oligomer of the general formula ##STR9## wherein R is a linear or a branched aliphatic, cycloaliphatic, aralkyl, aromatic, alkoxy alkyl or heterocyclic radical of 1 to 14 carbon atoms, n is an integer of 1 to 30 and has an average value of about from 1 to 20, and m is an integer of from 1 to 3 wherein the average molecular weight of the propylene oxide oligomers is about from 300 to 2500.
Claim 3
Dependent Claim
12 words
A laminar structure of claim 1 wherein the glazing material is glass.
Claim 4
Dependent Claim
13 words
A laminar structure of claim 1 wherein the glazing material is polycarbonate sheeting.
Claim 5
Dependent Claim
14 words
A laminar structure of claim 1 wherein the glazing material is polymethyl methacrylate sheeting.
Claim 6
Dependent Claim
19 words
A laminar structure of claim 2 comprising two sheets of glass with an interlayer of the plasticized polyvinyl butyral.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |