Patent US3049731A successfully refreshed from Google Patents.
US3049731A
Expired / Lapsed
US
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Support structure for inflated tubes in collapsible boats
Assignee: KLEPPER WERKE FA
•
Filing: 1958-08-12
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Granted: 1962-08-21
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Expires: 1978-08-12
Abstract
No abstract record available.
Inventors
- 👤 Ertl Alfred
- 👤 Hermann Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:57
CPC Classifications
B; B63; B63B; B63B7/00; B63B7/06; B63B7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1333109A
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US2156175A
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US2154040A
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US2338976A
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GB568444A
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US2396212A
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US2642590A
Cited
FR991326A
Cited
US2739321A
Cited
DE969796C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |