US2824952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of welding rails
Assignee: US Philips Corp
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Filing: 1955-05-12
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Granted: 1958-02-25
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Expires: 1975-05-12
Abstract
No abstract record available.
Inventors
- 👤 Zoethout Gerrit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:22
CPC Classifications
E; E01; E01B; E01B11/00; E01B11/44; E01B11/50; B; B23; B23K; B23K9/00; B23K9/02; B23K9/038; B23K2101/00; B23K2101/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |