Patent US2935238A successfully refreshed from Google Patents.
US2935238A
Expired / Lapsed
US
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Collapsible pyramid structures and blanks therefor
Assignee: Individual
•
Filing: 1958-01-30
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Granted: 1960-05-03
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Expires: 1978-01-30
Abstract
No abstract record available.
Inventors
- 👤 Koehler Karl Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:13
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/36; B65D5/3607; B65D5/008; Y; Y10; Y10S; Y10S206/00; Y10S206/815
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |