Patent US2537247A successfully refreshed from Google Patents.
US2537247A
Expired / Lapsed
US
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Door mechanism for gondola cars
Assignee: Individual
•
Filing: 1945-10-12
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Granted: 1951-01-09
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Expires: 1965-10-12
Abstract
No abstract record available.
Inventors
- 👤 Lambert J Tillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:34
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/003; B61D19/004; E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/1033
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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |