US1618142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making hollow bars
Assignee: Old Dominion Iron and Steel Corp
•
Filing: 1926-05-12
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Granted: 1927-02-15
•
Expires: 1946-05-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Wheelwright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:45
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T428/00; Y10T428/12; Y10T428/12306; Y10T428/12333
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) | 1930-02-14 | 1930-08-16 | 1931-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-02-14 | 1934-08-16 | 1935-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-02-14 | 1938-08-16 | 1939-02-15 | $7700.00 | Window Closed / Lapsed |