Patent US1231897A successfully refreshed from Google Patents.
US1231897A
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Method of making tubular bars.
Assignee: ROME MERCHANT IRON MILL
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Filing: 1916-06-29
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Granted: 1917-07-03
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Expires: 1936-06-29
Abstract
No abstract record available.
Inventors
- 👤 Weston Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:26
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49924; Y10T29/49936; Y10T403/00; Y10T403/70; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12451
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) | 1920-07-02 | 1921-01-01 | 1921-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-07-02 | 1925-01-01 | 1925-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-07-02 | 1929-01-01 | 1929-07-03 | $7700.00 | Window Closed / Lapsed |