US2847149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air eliminating device
Assignee: Symington Wayne Corp
•
Filing: 1956-08-17
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Granted: 1958-08-12
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Expires: 1976-08-17
Abstract
No abstract record available.
Inventors
- 👤 Freedom H Ainsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:09
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/76; B67D7/763; F; F04; F04D; F04D9/00; F04D9/001; F16; F16K; F16K24/00; F16K24/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US590173A
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US1242104A
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US1290803A
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US2297238A
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US2362724A
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US2635620A
Cited
US2693196A
Cited
US2625108A
Cited
US2776630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |