US3435470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam-filled boat hull
Assignee: Individual
•
Filing: 1967-08-07
•
Granted: 1969-04-01
•
Expires: 1987-08-07
Abstract
No abstract record available.
Inventors
- 👤 Leo M Krenzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:13
CPC Classifications
B; B63; B63B; B63B5/00; B63B5/24; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/18; B29C44/186; B29C44/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2744042A
Cited
US2816298A
Cited
US3078202A
Cited
US2956292A
Cited
US3013922A
Cited
FR1324015A
Cited
US3150386A
Cited
US3315284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |