US1856874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of centrifugal pipe molds
Assignee: United States Pipe and Foundry Co LLC
•
Filing: 1930-02-04
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Granted: 1932-05-03
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Expires: 1950-02-04
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Langenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:43
CPC Classifications
B; B22; B22D; B22D13/00; B22D13/10; B22D13/101; B21; B21D; B21D26/00; B21D26/02; B21D26/033; B21D26/043; B21D26/047; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805
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) | 1935-05-03 | 1935-11-02 | 1936-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-05-03 | 1939-11-02 | 1940-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-05-03 | 1943-11-02 | 1944-05-03 | $7700.00 | Window Closed / Lapsed |