US2087983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draft equalizer for gas burners
Assignee: Lone Star Gas Co
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Filing: 1935-04-30
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Granted: 1937-07-27
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Expires: 1955-04-30
Abstract
No abstract record available.
Inventors
- 👤 Martin James Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:38
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/001; F24C15/002; F23; F23L; F23L17/00; F23L17/02; F23L17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-07-26 | 1941-01-25 | 1941-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-07-26 | 1945-01-25 | 1945-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-07-26 | 1949-01-25 | 1949-07-27 | $7700.00 | Window Closed / Lapsed |