Patent US3530881A successfully refreshed from Google Patents.
US3530881A
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Liquid flow proportioning devices
Assignee: T K S AIRCRAFT DE ICING Ltd
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Filing: 1967-05-10
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Granted: 1970-09-29
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Expires: 1987-05-10
Abstract
No abstract record available.
Inventors
- 👤 Dennis C Tanner
- 👤 Bryan Ernest Humphreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/02; B64D15/06; F; F16; F16L; F16L39/00; G; G05; G05D; G05D11/00; G05D11/02; G05D7/00; G05D7/01; G05D7/0186; Y; Y10; Y10T; Y10T137/00; Y10T137/8593
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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |