US3520543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for suction type anchors
Assignee: T-HYDRONAUTICS Inc A CORP OF TX
•
Filing: 1967-09-19
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Granted: 1970-07-14
•
Expires: 1987-09-19
Abstract
No abstract record available.
Inventors
- 👤 Robert J Etter
- 👤 John O Scherer Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:28
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2190476A
Cited
US2347491A
Cited
US2700196A
Cited
US2688436A
Cited
US3051117A
Cited
US3348517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |