US3055533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary seal for floating roofs
Assignee: Chicago Bridge and Iron Co
•
Filing: 1961-01-23
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Granted: 1962-09-25
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 Reese Richard
- 👤 Ivan L Wissmiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:49
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42; B65D88/50
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) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |