US1794435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for making corrugated sheets
Assignee: Ambler Asbestos Shingle & Shea
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Filing: 1929-09-20
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Granted: 1931-03-03
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Expires: 1949-09-20
Abstract
No abstract record available.
Inventors
- 👤 Fred W Barth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:46
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/528; Y; Y10; Y10S; Y10S264/00; Y10S264/57; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-03-02 | 1934-09-01 | 1935-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-03-02 | 1938-09-01 | 1939-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-03-02 | 1942-09-01 | 1943-03-03 | $7700.00 | Window Closed / Lapsed |