US2707942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Firetube boiler
Assignee: Avco Manufacturing Corp
•
Filing: 1951-09-14
•
Granted: 1955-05-10
•
Expires: 1971-09-14
Abstract
No abstract record available.
Inventors
- 👤 Robert R Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:51
CPC Classifications
F; F22; F22B; F22B33/00; F22B33/02; F22B33/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US334156A
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US581512A
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US1779939A
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US1870059A
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US1854084A
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US1933229A
Cited
US2079503A
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US2087839A
Cited
US2111655A
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US2207162A
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US2548287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |