US2564075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator attachment
Assignee: DOHRMANN HOTEL SUPPLY CO
•
Filing: 1949-03-04
•
Granted: 1951-08-14
•
Expires: 1969-03-04
Abstract
No abstract record available.
Inventors
- 👤 Wray Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:11
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US120439A
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US607976A
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US888163A
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US916699A
Cited
US1463242A
Cited
DE444228C
Cited
US2081640A
Cited
US2392038A
Cited
US2369375A
Cited
US2481341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |