US2762472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow sheet metal panels and method of making the sections from which such panels are made
Assignee: PITTSBURGH DES MOINES Co
•
Filing: 1952-02-08
•
Granted: 1956-09-11
•
Expires: 1972-02-08
Abstract
No abstract record available.
Inventors
- 👤 James O Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:59
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/002; E; E04; E04C; E04C2/00; E04C2/02; E04C2/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49629; Y10T29/49826; Y10T29/49879; Y10T29/49893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1498176A
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US1644940A
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US1972570A
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US1988314A
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GB393771A
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US2052346A
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FR791124A
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US2184113A
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US2100957A
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US2180502A
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US2186310A
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US2439960A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |