US3506531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erosion resistant reinforced plastic construction
Assignee: United States Department of the Navy
•
Filing: 1967-01-26
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Granted: 1970-04-14
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Expires: 1987-01-26
Abstract
No abstract record available.
Inventors
- 👤 Maxwell Stander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:50
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/003; B29K; B29K2309/00; B29K2309/08; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3707; Y10T442/378; Y10T442/3813
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2625499A
Cited
US2705223A
Cited
US2994940A
Cited
US3152949A
Cited
US3299169A
Cited
US3300369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |