US3490996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar heated water vapor lifting and condensing system
Assignee: HERBERT C KELLY JR
•
Filing: 1968-04-10
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Granted: 1970-01-20
•
Expires: 1988-04-10
Abstract
No abstract record available.
Inventors
- 👤 Herbert C Kelly Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:34
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/14; F; F24; F24S; F24S20/00; F24S20/20; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/208; Y02A20/212; Y02E; Y02E10/00; Y02E10/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3138546A
Cited
US3290229A
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US3232846A
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US3300394A
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US3359183A
Cited
US3338797A
Cited
US3414481A
Cited
US3397119A
Cited
US3436908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |