US2909197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for metering and expanding anhydrous ammonia gas
Assignee: Individual
•
Filing: 1956-11-26
•
Granted: 1959-10-20
•
Expires: 1976-11-26
Abstract
No abstract record available.
Inventors
- 👤 Otis M Liley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:31
CPC Classifications
A; A01; A01C; A01C23/00; A01C23/02; A01C23/023; A01C23/024; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86831
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1989468A
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US2780833A
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US2821210A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |