US3178334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety-glass laminate
Assignee: EIDP Inc
•
Filing: 1961-09-14
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Granted: 1965-04-13
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Expires: 1981-09-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Chester Griswold Bragaw
- 👤 Orowan Egon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:44
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B32B17/10009; B32B17/10036; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/3163; Y10T428/31855; Y10T428/31859
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A SAFETY-GLAS LAMINATE HAVING TWO OUTER LAYERS OF GLASS AND A CENTRAL LAYER COMPRISING TWO SUPERIMPOSED INTERLAYERS, EACH OF SAID INTERLAYERS HAVING A THICKNESS OF AT LEAST ABOUT 10 MILS, THE FIRST OF SAID TWO INTERLAYERS BEING FORMED OF PLASTICIZED POLYVINYL BUTYRAL HAVING A HYDROXYL CONTENT OF OVER 16% CALCULATEDAS PERCENT VINYL ALCOHOL, THE SECOND OF SAID TWO INTERLAYERS BEING FORMED OF PLASTICIZED POLYVINYL BUTYRAL HAVING A HYDROXYL CONTENT OF LESS THAN 25% CALCULATED AS PERCENT VINYL ALCOHOL, THE SAID FIRST INTERLAYER HAVING A HYDROXYL CONTENT AT LEAST 2.5% LESS THAN SAID SECOND LAYER.
Claim 2
Dependent Claim
94 words
A SAFETY-GLAS LAMINATE HAVING TWO OUTER LAYERS OF GLASS AND A CENTRAL LAYER COMPRISING TWO SUPERIMPOSED INTERLAYERS, EACH OF SAID INTERLAYERS HAVING A THICKNESS OF AT LEAST ABOUT 10 MILS, THE FIRST OF SAID TWO INTERLAYERS BEING FORMED OF PLASTICIZED POLYVINYL BUTYRAL HAVING A HYDROXYL CONTENT OF OVER 16% CALCULATEDAS PERCENT VINYL ALCOHOL, THE SECOND OF SAID TWO INTERLAYERS BEING FORMED OF PLASTICIZED POLYVINYL BUTYRAL HAVING A HYDROXYL CONTENT OF LESS THAN 25% CALCULATED AS PERCENT VINYL ALCOHOL, THE SAID FIRST INTERLAYER HAVING A HYDROXYL CONTENT AT LEAST 2.5% LESS THAN SAID SECOND LAYER.
References Cited (Backward Citations)
US2526728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |