US2528089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible floating structure
Assignee: MERRITT CHAPMAN AND SCOTT CORP
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Filing: 1947-07-31
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Granted: 1950-10-31
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Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Albert C W Siecke
- 👤 Davidon Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:22
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/027; E02B2017/0039
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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |