US3050867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assembly for employing drier exhaust heat for preheating inlet water
Assignee: Individual
•
Filing: 1960-04-20
•
Granted: 1962-08-28
•
Expires: 1980-04-20
Abstract
No abstract record available.
Inventors
- 👤 Paul J Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:43
CPC Classifications
D; D06; D06F; D06F58/00; D06F58/20; D06F39/00; D06F39/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1720537A
Cited
US1264442A
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US1782209A
Cited
US1731290A
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US2152331A
Cited
US2312292A
Cited
US2365791A
Cited
US2641062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |