US3721057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partition wall
Assignee: LUST E KG DT
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Filing: 1971-01-19
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Granted: 1973-03-20
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Expires: 1991-01-19
Abstract
Abstract A PARTITION WALL IS PROVIDED WHICH HAS BOX SHAPE COLUMNS SLIDABLY MOUNTED ON SECURING MEMBERS FIXED TO THE CEILING AND WALL, THE COLUMNS BEING SECURED IN PLACE BY DETACHABLE ENGAGEMENT, AT OPPOSITE SIDES THEREOF, WITH COVER PANELS WHICH MAY BE SOLID, TRANSPARENT, FIXED OR CONSTRUCTED AS A DOOR.
Inventors
- 👤 B Lieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:31
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/76; E04B2/78; E04B2/7854
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |