Patent US1857526A successfully refreshed from Google Patents.
US1857526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electric welding pressure vessels
Assignee: AO Smith Corp
•
Filing: 1929-12-16
•
Granted: 1932-05-10
•
Expires: 1949-12-16
Abstract
No abstract record available.
Inventors
- 👤 Howard J Burnish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:45
CPC Classifications
B; B23; B23K; B23K33/00; B23K33/004; F; F16; F16L; F16L41/00; F16L41/08; F16L41/082; F16L41/084; Y; Y10; Y10S; Y10S220/00; Y10S220/04; Y10S220/29
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1935-05-10 | 1935-11-09 | 1936-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-05-10 | 1939-11-09 | 1940-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-05-10 | 1943-11-09 | 1944-05-10 | $7700.00 | Window Closed / Lapsed |