US2804681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming curved rack bars
Assignee: AO Smith Corp
•
Filing: 1954-03-08
•
Granted: 1957-09-03
•
Expires: 1974-03-08
Abstract
No abstract record available.
Inventors
- 👤 Karl K Brueckner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:37
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49462; Y10T29/49467; Y10T29/49476; Y10T29/4981; Y10T29/49826; Y10T29/49861; Y10T29/49893
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US980950A
Cited
US1582571A
Cited
US1670476A
Cited
US1654037A
Cited
US2044322A
Cited
US2088120A
Cited
US2144915A
Cited
US2645842A
Cited
US2489993A
Cited
US2558877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |