US2994307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical tube heater
Assignee: YUBA CONS IND Inc
•
Filing: 1960-03-03
•
Granted: 1961-08-01
•
Expires: 1980-03-03
Abstract
No abstract record available.
Inventors
- 👤 John W Throckmorton
- 👤 John S Wallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:35
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; F; F22; F22B; F22B21/00; F22B21/02; F22B21/04; F22B21/06; F22B21/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2340289A
Cited
US2745388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |