Patent US3404618A successfully refreshed from Google Patents.
US3404618A
Expired / Lapsed
US
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Combination heating, ventilating and recirculating system for greenhouses
Assignee: JACOBS BROS TEXTILE CO Inc
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Filing: 1967-12-26
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Granted: 1968-10-08
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Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Jacobs Paul Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:22
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; A; A01; A01G; A01G9/00; A01G9/24; A01G9/246; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |