US2933241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window or ring ventilator
Assignee: Industriele Onderneming WH Braskamp NV
•
Filing: 1957-11-04
•
Granted: 1960-04-19
•
Expires: 1977-11-04
Abstract
No abstract record available.
Inventors
- 👤 Braskamp Willem Hendrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:47
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/12; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US364074A
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US1713842A
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US1769922A
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US1931156A
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US1988810A
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US2227765A
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US2316634A
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US2592002A
Cited
US2804008A
Cited
US2857095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |