US2449458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass building block
Assignee: Individual
•
Filing: 1946-04-26
•
Granted: 1948-09-14
•
Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 Nathaniel C Dryden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:09
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/40; E04C1/41; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249969
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US711541A
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US1794678A
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US2067313A
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US2205534A
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US2310432A
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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) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |