Patent CA545462A successfully refreshed from Google Patents.
Patent US2869749A successfully refreshed from Google Patents.
US2869749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Penetration structure for pressure vessels
Assignee: Chicago Bridge and Iron Co
•
Filing: 1954-04-27
•
Granted: 1959-01-20
•
Expires: 1974-04-27
Abstract
No abstract record available.
Inventors
- 👤 Arne Christian
- 👤 Leonard P Zick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:40
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/02; G21C13/028; G21C13/0285; B; B65; B65D; B65D90/00; B65D90/54; F; F17; F17B; F17B1/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US807795A
Cited
US1118970A
Cited
US1490622A
Cited
US1808599A
Cited
US1864837A
Cited
US2359835A
Cited
US2366688A
Cited
US2672254A
Cited
US2668634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |