US2752691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireplace form
Assignee: National Development Corp
•
Filing: 1954-10-18
•
Granted: 1956-07-03
•
Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Bender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:43
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/14; E04G21/16; E04G21/18; E04G21/1841; E04G9/00; E04G9/08; E04G9/083; F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/189; F24B1/1895
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US856060A
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US1106162A
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US1350495A
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US1520223A
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US1531535A
Cited
US1728214A
Cited
US1779007A
Cited
US1853116A
Cited
US2065510A
Cited
US2494527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-03 | 1960-01-02 | 1960-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-03 | 1964-01-02 | 1964-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-03 | 1968-01-02 | 1968-07-03 | $7700.00 | Window Closed / Lapsed |