Patent US3658636A successfully refreshed from Google Patents.
US3658636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated safety glass and laminated bullet-proof glass
Assignee: Dynamit Nobel AG
•
Filing: 1970-07-01
•
Granted: 1972-04-25
•
Expires: 1990-07-01
Abstract
Abstract Safety or bullet-proof glass composed of at least one layer of silicate glass, amorphous polyamide sheeting and polyvinyl butyral as the adhesive between the polyamide layers and the silicate glass with the silicate glass being at least one of the outside layers. Multiple layers of polyamide and/or silicate glass on each side of the polyvinyl butyral may be used.
Inventors
- 👤 Rolf Beckmann
- 👤 Johannes Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:45
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/1055; B32B17/10724; B32B17/10761; B32B27/34; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G69/00; C08G69/02; C08G69/36; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0407; B32B2571/00; B32B2571/02; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/3163; Y10T428/31725; Y10T428/31761; Y10T428/31942; Y10T428/31946
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
Safety glass as claimed in claim 1, wherein said polyamide is a terephthalic acid-trimethyl hexamethylene diamine polyamide having preferably a viscosity number of 92 to 130.
Claim 2
Dependent Claim
26 words
Safety glass as claimed in claim 1, wherein said polyamide is a dimethyl terephthalate-trimethyl hexamethylene diamine polyamide having a viscosity number preferably of 100 to 160.
Claim 3
Dependent Claim
26 words
Safety glass as claimed in claim 1, wherein said polyamide is a terephthalic acid/isophthalic acidhexamethylene diamine polyamide having a viscosity number preferably of 100 to 160.
Claim 4
Dependent Claim
25 words
Safety glass as claimed in claim 1, wherein said polyamide is an adipic acid-hexamethylene diamine-p,p''-diamino dicyclohexylmethane-caprolactam polyamide having a viscosity number of 100 to 160.
Claim 5
Dependent Claim
23 words
Safety glass as claimed in claim 1 having two outside silicate glass layers and two inside layers of said amorphous polyamide sheet material.
References Cited (Backward Citations)
US2399184A
Cited
US3009845A
Cited
US2861021A
Cited
US2991209A
Cited
US3150117A
Cited
US3145195A
Cited
US3447999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |