Patent US3254459A successfully refreshed from Google Patents.
US3254459A
Expired / Lapsed
US
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Dome construction
Assignee: Union Tank Car Co
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Filing: 1961-12-20
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Granted: 1966-06-07
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Expires: 1981-12-20
Abstract
No abstract record available.
Inventors
- 👤 Robert W Bodley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:44
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; E04B7/10; E04B7/105; E04B1/00; E04B1/32; E04B1/3211; E04B2001/3235; E04B2001/3241; E04B2001/3252; E04B2001/3294
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |