US2900814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete block construction with a compartment having a knock-out panel
Assignee: Individual
•
Filing: 1958-02-25
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Granted: 1959-08-25
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Expires: 1978-02-25
Abstract
No abstract record available.
Inventors
- 👤 Samuel R Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:44
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/39; E04C1/397; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/22
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |