Patent US1754971A successfully refreshed from Google Patents.
US1754971A
Expired / Lapsed
US
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Vaporizing apparatus or appliance
Assignee: FRANCES E WAIGAND
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Filing: 1928-12-12
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Granted: 1930-04-15
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Expires: 1948-12-12
Abstract
No abstract record available.
Inventors
- 👤 Charles F Waigand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:37
CPC Classifications
A; A61; A61H; A61H35/00; A61H35/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-04-14 | 1933-10-14 | 1934-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-14 | 1937-10-14 | 1938-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-14 | 1941-10-14 | 1942-04-15 | $7700.00 | Window Closed / Lapsed |