US2736399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall structure
Assignee: Erie Enameling Co
•
Filing: 1950-05-02
•
Granted: 1956-02-28
•
Expires: 1970-05-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert R Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:44
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/88; E04B2/90; E04B2/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1417102A
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US1700512A
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US1990259A
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US2049278A
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US2076388A
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US2128797A
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US2086571A
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US2114155A
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US2117397A
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US2363164A
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US2508032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |