US3286415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced shell construction
Assignee: Individual
•
Filing: 1962-08-22
•
Granted: 1966-11-22
•
Expires: 1982-08-22
Abstract
No abstract record available.
Inventors
- 👤 Norman E Schlenker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:04
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; E04B7/10; E04B7/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US679430A
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US671679A
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US1464711A
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US1688723A
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US1973742A
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US2233054A
Cited
US2268311A
Cited
US2245690A
Cited
US2425079A
Cited
GB735306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |