Patent US2723492A successfully refreshed from Google Patents.
US1996490A
Expired / Lapsed
US
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Cellular structure for panels and other applications
Assignee: Individual
•
Filing: 1933-06-30
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Granted: 1935-04-02
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Expires: 1953-06-30
Abstract
No abstract record available.
Inventors
- 👤 Romanoff Hippolyte Waldemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:00
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/32; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24661; Y10T428/24669; Y10T428/24686; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-04-01 | 1938-10-01 | 1939-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-01 | 1942-10-01 | 1943-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-01 | 1946-10-01 | 1947-04-02 | $7700.00 | Window Closed / Lapsed |