US2732886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing corrugated roofing material
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:27
CPC Classifications
B; B21; B21D; B21D13/00; B21D13/04; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/30; B31F1/305; E; E04; E04D; E04D3/00; E04D3/24; E04D3/35; E04D5/00; E04D5/10; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/1018; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31641
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US506745A
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US540992A
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US1839200A
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US2016429A
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US2091918A
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GB415739A
Cited
US2071360A
Cited
FR831714A
Cited
US2290608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |