US2323936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating construction element
Assignee: Rubatex Products Inc
•
Filing: 1937-07-15
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Granted: 1943-07-13
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Expires: 1957-07-15
Abstract
No abstract record available.
Inventors
- 👤 Roberts Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249981; Y10T428/249987; Y10T428/24999; Y10T428/31504; Y10T428/31826
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) | 1946-07-12 | 1947-01-11 | 1947-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-07-12 | 1951-01-11 | 1951-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-07-12 | 1955-01-11 | 1955-07-13 | $7700.00 | Window Closed / Lapsed |