US2847755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of erecting floating roofs and apparatus therefor
Assignee: Chicago Bridge and Iron Co
•
Filing: 1954-03-08
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Granted: 1958-08-19
•
Expires: 1974-03-08
Abstract
No abstract record available.
Inventors
- 👤 John F Mummert
- 👤 Williams Bart
- 👤 Robert L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:02
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828; Y10T29/49904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511873A
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US1839578A
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US1819973A
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US2616162A
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US2554768A
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US2606684A
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US2605540A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |