US2927787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure door
Assignee: Chicago Bridge and Iron Co
•
Filing: 1958-06-12
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Granted: 1960-03-08
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Expires: 1978-06-12
Abstract
No abstract record available.
Inventors
- 👤 James B Maher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:33
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/02; G21C13/06; B; B01; B01J; B01J3/00; B01J3/03; F; F16; F16J; F16J13/00; F16J13/02; F16J13/06; F16J13/12; F23; F23M; F23M7/00; G21C13/028; G21C13/0285; E; E06; E06B; E06B5/00; E06B5/10; E06B5/12; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20238
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |