US2326536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for piercing tubes
Assignee: MID WEST HYDRO PIERCE Inc
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Filing: 1942-03-09
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Granted: 1943-08-10
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Expires: 1962-03-09
Abstract
No abstract record available.
Inventors
- 👤 Guy M Hartsock
- 👤 Harold S Rounds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:11
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/28; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304536; Y10T409/30532; Y10T409/305432; Y10T83/00; Y10T83/384; Y10T83/387; Y10T83/39; Y10T83/391; Y10T83/395; Y10T83/40; Y10T83/401; Y10T83/444; Y10T83/4475; Y10T83/4478; Y10T83/461; Y10T83/4612; Y10T83/869; Y10T83/8821; Y10T83/8858
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) | 1946-08-09 | 1947-02-08 | 1947-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-08-09 | 1951-02-08 | 1951-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-08-09 | 1955-02-08 | 1955-08-10 | $7700.00 | Window Closed / Lapsed |