Patent US1672461A successfully refreshed from Google Patents.
Patent US2923226A successfully refreshed from Google Patents.
US2923226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire venting roof structure
Assignee: SAWCO Inc A CORP
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Filing: 1955-12-29
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Granted: 1960-02-02
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Expires: 1975-12-29
Abstract
No abstract record available.
Inventors
- 👤 Wasserman Max
- 👤 Stetson Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:23
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; F24F11/00; F24F11/30; F24F11/32; F24F11/33; F24F11/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1418732A
Cited
US1898821A
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US2100782A
Cited
US2329476A
Cited
US2725003A
Cited
US2827003A
Cited
US2825275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |