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Patent US3485216A successfully refreshed from Google Patents.
US3485216A
Expired / Lapsed
US
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Vapor generator
Assignee: Comstock and Wescott Inc
•
Filing: 1968-11-06
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Granted: 1969-12-23
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Expires: 1988-11-06
Abstract
No abstract record available.
Inventors
- 👤 Willis Thompson Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:15
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2383924A
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US2791204A
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US2911513A
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US3127936A
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US3062510A
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US3196841A
Cited
US3314400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |