US2489844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welded steel units for expansion joints
Assignee: Zallea Brothers Inc
•
Filing: 1945-08-18
•
Granted: 1949-11-29
•
Expires: 1965-08-18
Abstract
No abstract record available.
Inventors
- 👤 James P Zallea
- 👤 John J Mank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:08
CPC Classifications
D; D01; D01G; D01G15/00; D01G15/02; D01G15/12; D01G15/36; D01G15/38; F; F16; F16L; F16L51/00; F16L51/02; F16L51/025; F16L51/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319457A
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US1052709A
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US1057763A
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US1691040A
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US1835298A
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US1797151A
Cited
US1716429A
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US2104776A
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US2293997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |