US3051146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water tube boiler or steam generator
Assignee: Vapor Heating Corp
•
Filing: 1961-06-15
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Granted: 1962-08-28
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Expires: 1981-06-15
Abstract
No abstract record available.
Inventors
- 👤 Clarkson Alick
- 👤 Spur Paul
- 👤 Donald W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:05
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F24H1/43; F22; F22B; F22B21/00; F22B21/22; F22B21/26; Y; Y10; Y10S; Y10S56/00; Y10S56/03
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) | 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 |