Patent US1907507A successfully refreshed from Google Patents.
US3671370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral transparent safety glass armor unit
Assignee: PPG Industries Inc
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Filing: 1970-06-15
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Granted: 1972-06-20
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Expires: 1990-06-15
Abstract
Abstract A TRANSPARENT SAFETY GLASS ASSEMBLY COMPRISING A LAMINATED GLASS-PLASTIC ASSEMBLY COMPRISING A PLURALITY OF ALTERNATE PLIES OF GLASS AND THERMOPLASTIC TRANSPARENT INTERLAYERS OF PLASTICIZED POLYVINYL BUTYRAL ARRANGED TO PROVIDE AN IMPACT STRIKING SECTION, A TRANSPARENT POLYURETHANE PLASTICIZED IN SITU TO PROVIDE A TRANSITION SECTION AND A TRANSPARENT POLYCARBONATE PROVIDING AN IMPACT ABSORPTION SECTION IS DISCLOSED. THE IMPACT TRANSITION SECTION ALSO SPACES THE GLASS-PLASTIC ASSEMBLY FROM A CASING IN WHICH THE ASSEMBLY IS MOUNTED.
Inventors
- 👤 Harry E Littell Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:41
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0407; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10045; B32B17/10165; B32B17/10293; B32B17/10302; B32B17/1055; B32B17/10752; B32B17/10761; B32B17/1077; F41H5/26; B32B2369/00; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31598; Y10T428/31601; Y10T428/31627; Y10T428/3163
Claims Analysis
Total Claims: 0
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |