Patent US2976648A successfully refreshed from Google Patents.
US2976648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal roof construction
Assignee: Individual
•
Filing: 1957-07-03
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Granted: 1961-03-28
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Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 Robert C Linck
- 👤 Roads Panorama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:19
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/36; E04D3/366; E04D3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US230161A
Cited
US1116244A
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US1427943A
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US2055127A
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US2183844A
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US2408557A
Cited
US2552092A
Cited
FR1146249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |