Patent US3570182A successfully refreshed from Google Patents.
US3570182A
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US
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Window constructions
Assignee: A KNAG AS
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Filing: 1968-12-18
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Granted: 1971-03-16
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Expires: 1988-12-18
Abstract
Abstract A WINDOW CONSTRUCTION IN WHICH A SLIDABLE WINDOW IS MOUNTED IN A FRAME ADAPTED FOR LOCATION IN AN OUTER BUILDING WALL, THE FRAME DEFINING AT THE INSIDE FACE OF THE WINDOW A CHAMBER WHICH ENABLES THE PRESSURE ON BOTH SIDES OF THE WINDOW TO REMAIN SUBSTANTIALLY THE SAME UNDER VARIOUS WEATHER CONDITIONS.
Inventors
- 👤 Bjorn Bakke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:37
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/42; E06B3/46; E06B3/4681
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |