Patent US2902047A successfully refreshed from Google Patents.
US2902047A
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US
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Gas pressure loaded regulator
Assignee: BLACKMAN KEITH Ltd
•
Filing: 1954-08-23
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Granted: 1959-09-01
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Expires: 1974-08-23
Abstract
No abstract record available.
Inventors
- 👤 Tavener Ernest Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:46
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/365; G05D16/14; G05D16/18; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7801; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87861; Y10T137/87917; Y10T137/88054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US424199A
Cited
US1877576A
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US1949030A
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US880402A
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US1638519A
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US1992355A
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US2270304A
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US2586094A
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US2694545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |