Patent US3881973A successfully refreshed from Google Patents.
Patent US3553918A successfully refreshed from Google Patents.
US3553918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated curtain wall construction
Assignee: PPG Industries Inc
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Filing: 1969-07-22
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Granted: 1971-01-12
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Expires: 1989-07-22
Abstract
Abstract AN INSULATED CURTAIN WALL CONSTRUCTION COMPRISING A METAL PANEL-BACKING MEMBER ADJUSTABLY JOINED BY THERMALLY INSULATED CONNECTOR MEANS TO A METAL PANEL-RETAINING MEMBER, A PANEL DISPOSED BETWEEN SAID BACKING AND RETAINING MEMBERS AND INSULATING GLAZING MATERIAL DISPOSED BETWEEN SAID PANEL AND SAID BACKING AND RETAINING MEMBERS WHEREBY THE PANEL-BACKING MEMBER AND PANELRETAINING MEMBER ARE EACH INSULATED FROM THE OTHER AND FROM SAID PANEL MEMBER DISPOSED THEREBETWEEN.
Inventors
- 👤 Samuel Dauson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:23
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/88; E04B2/96
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |