Patent US2721157A successfully refreshed from Google Patents.
US2721157A
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Assignee: PPG Industries Inc
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Filing: 1953-01-05
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Granted: 1955-10-18
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Expires: 1973-01-05
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Martin
- 👤 Oscar D Englehart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:21
CPC Classifications
E; E06; E06B; E06B5/00; E06B5/10; E06B5/12; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN EXPLOSION-RESISTANT WINDOW COMPRISING A PLURALITY OF COPLANAR SEGMENTS OF LAMINATED GLASS THAT COOPERATE TO FORM A WINDOW PANE, ONE EDGE OF EACH OF SAID SEGMENTS FORMING A PORTION OF THE PERIMETER OF SAID WINDOW PANE AND EACH SEGMENT HAVING TWO OTHER EDGES BEING ADJACENT TO BUT SLIGHTLY SPACED FROM THE CORRESPONDING EDGES OF THE OTHER SEGMENTS OF SAID PANE AND A YIELDING ELASTIC MATERIAL CONNECTED TO EACH SEGMENT ALONG THE ENTIRE LENGTH OF EACH OF SAID OTHER EDGES OF THE SEGMENT AND CONNECTING ADJACENT SEGMENTS TO SECURE SAID SEGMENTS TOGETHER AND TO COOPERATE WITH SAID SEGMENTS TO PROVIDE A SUBSTANTIALLY IMPERMEABLE WINDOW PANE WHEN THE SEGMENTS ARE COPLANAR.
Claim 2
Dependent Claim
109 words
AN EXPLOSION-RESISTANT WINDOW COMPRISING A PLURALITY OF COPLANAR SEGMENTS OF LAMINATED GLASS THAT COOPERATE TO FORM A WINDOW PANE, ONE EDGE OF EACH OF SAID SEGMENTS FORMING A PORTION OF THE PERIMETER OF SAID WINDOW PANE AND EACH SEGMENT HAVING TWO OTHER EDGES BEING ADJACENT TO BUT SLIGHTLY SPACED FROM THE CORRESPONDING EDGES OF THE OTHER SEGMENTS OF SAID PANE AND A YIELDING ELASTIC MATERIAL CONNECTED TO EACH SEGMENT ALONG THE ENTIRE LENGTH OF EACH OF SAID OTHER EDGES OF THE SEGMENT AND CONNECTING ADJACENT SEGMENTS TO SECURE SAID SEGMENTS TOGETHER AND TO COOPERATE WITH SAID SEGMENTS TO PROVIDE A SUBSTANTIALLY IMPERMEABLE WINDOW PANE WHEN THE SEGMENTS ARE COPLANAR.
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) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |