Patent US2573340A successfully refreshed from Google Patents.
US2573340A
Expired / Lapsed
US
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Operating means for greenhouse ventilating panels
Assignee: Individual
•
Filing: 1947-02-05
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Granted: 1951-10-30
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Expires: 1967-02-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Kleinhans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:16
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/24; A01G9/241; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25; Y10; Y10T; Y10T292/00; Y10T292/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1046202A
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US1093099A
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US2024056A
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US2200706A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |