Patent US2762448A successfully refreshed from Google Patents.
US2762448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam heated roof drain
Assignee: J A ZURN Manufacturing Co
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Filing: 1952-01-10
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Granted: 1956-09-11
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Expires: 1972-01-10
Abstract
No abstract record available.
Inventors
- 👤 John H Schmid
- 👤 Hurley V Boggess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:25
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/04; E04D13/0404; E04D13/0409; E04D2013/0418
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US824570A
Cited
AT51165B
Cited
US1046910A
Cited
US1351293A
Cited
US1988669A
Cited
US2199670A
Cited
US2111251A
Cited
US2210256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |