US1755321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding hydraulic apparatus
Assignee: Welding Engineers Inc
•
Filing: 1926-04-02
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Granted: 1930-04-22
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Expires: 1946-04-02
Abstract
No abstract record available.
Inventors
- 👤 John B Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:31
CPC Classifications
B; B23; B23P; B23P6/00; F; F01; F01D; F01D5/00; F01D5/005; F03; F03B; F03B11/00; F03B11/04; F03B3/00; F03B3/12; F03B3/126; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49318
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) | 1933-04-21 | 1933-10-21 | 1934-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-21 | 1937-10-21 | 1938-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-21 | 1941-10-21 | 1942-04-22 | $7700.00 | Window Closed / Lapsed |