US818439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming hermetic seams in sheet metal.
Assignee: Individual
•
Filing: 1905-03-18
•
Granted: 1906-04-24
•
Expires: 1925-03-18
Abstract
No abstract record available.
Inventors
- 👤 Oscar Heindorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:45
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/2676; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/4991; Y10T428/00; Y10T428/12; Y10T428/12354
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) | 1909-04-23 | 1909-10-23 | 1910-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-04-23 | 1913-10-23 | 1914-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-04-23 | 1917-10-23 | 1918-04-24 | $7700.00 | Window Closed / Lapsed |