US2638276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rail fastening
Assignee: Individual
•
Filing: 1950-05-27
•
Granted: 1953-05-12
•
Expires: 1970-05-27
Abstract
No abstract record available.
Inventors
- 👤 Stamm Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:04
CPC Classifications
E; E01; E01B; E01B9/00; E01B9/38; E01B9/44; E01B9/46; E01B9/48; E01B9/486; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/974
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1077720A
Cited
US1214689A
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US1249161A
Cited
US1778887A
Cited
US1815815A
Cited
US1798357A
Cited
US2151026A
Cited
US2386315A
Cited
US2479932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |