US2004138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making wrought iron pipe
Assignee: AM Byers Co
•
Filing: 1932-11-30
•
Granted: 1935-06-11
•
Expires: 1952-11-30
Abstract
No abstract record available.
Inventors
- 👤 Edward B Story
- 👤 Charles E Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:14
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/283; Y; Y10; Y10S; Y10S403/00; Y10S403/02; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49391; Y10T29/49789; Y10T29/49798; Y10T428/00; Y10T428/12; Y10T428/12292
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) | 1938-06-10 | 1938-12-10 | 1939-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-10 | 1942-12-10 | 1943-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-10 | 1946-12-10 | 1947-06-11 | $7700.00 | Window Closed / Lapsed |