Patent US2487323A successfully refreshed from Google Patents.
US2487323A
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US
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Fuel supply system for gas fired heating plants and valve therefor
Assignee: Individual
•
Filing: 1947-11-06
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Granted: 1949-11-08
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Expires: 1967-11-06
Abstract
No abstract record available.
Inventors
- 👤 Verna F Fewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:10
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0675; F16K31/0679
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1167815A
Cited
US1242003A
Cited
US1475129A
Cited
US2238401A
Cited
US2290047A
Cited
US2363073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |