Patent US3173448A successfully refreshed from Google Patents.
US3173448A
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US
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Ammonia flow regulators
Assignee: Individual
•
Filing: 1962-12-14
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Granted: 1965-03-16
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Expires: 1982-12-14
Abstract
No abstract record available.
Inventors
- 👤 James S Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:38
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; F; F16; F16K; F16K5/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/794; Y10T137/8085; Y10T137/8593; Y10T137/87917; Y10T137/88046; Y10T137/88062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |