US3376185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contour core structure
Assignee: Balsa Development Corp
•
Filing: 1964-08-12
•
Granted: 1968-04-02
•
Expires: 1984-08-12
Abstract
No abstract record available.
Inventors
- 👤 Gerald D Shook
- 👤 Robert S Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:22
CPC Classifications
B; B63; B63B; B63B5/00; B63B5/24; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075; Y10T156/1077; Y10T156/12; Y10T156/1317; Y10T156/1322; Y10T156/133; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1734; Y10T156/1744; Y10T156/1751; Y10T156/1754; Y10T156/1759; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/24628; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 0
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US3139371A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |