US3548557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partition wall
Assignee: DONN PRODUCTS Inc
•
Filing: 1968-07-09
•
Granted: 1970-12-22
•
Expires: 1988-07-09
Abstract
No abstract record available.
Inventors
- 👤 Lucien R Downing Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:39
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/76; E04B2/78; E04B2/7854; E04B2002/7461; E04B2002/7462
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB445476A
Cited
US2277792A
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US2312673A
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US2627949A
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US2877877A
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US3026977A
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US3232395A
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US3381438A
Cited
US3363383A
Cited
US3410043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |