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Patent US3045784A successfully refreshed from Google Patents.
US3045784A
Expired / Lapsed
US
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Metallic wall construction
Assignee: PORCEL ENGINEERING Co
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Filing: 1960-05-02
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Granted: 1962-07-24
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Expires: 1980-05-02
Abstract
No abstract record available.
Inventors
- 👤 Lester W Hasekamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:44
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/56; E04B2/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1966041A
Cited
US2007842A
Cited
US2074000A
Cited
US2371921A
Cited
GB599793A
Cited
US2416240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |