US2747703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall panel construction
Assignee: AO Smith Corp
•
Filing: 1952-03-29
•
Granted: 1956-05-29
•
Expires: 1972-03-29
Abstract
No abstract record available.
Inventors
- 👤 Leonard E Broberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/56; E04B2/58; E04B2/60; E04B2/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US742873A
Cited
US1295368A
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GB395098A
Cited
US2140709A
Cited
US2065531A
Cited
US2145469A
Cited
US2263510A
Cited
US2347756A
Cited
US2376728A
Cited
US2519162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |