US2833305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grid-type valves
Assignee: Belliss and Morcom Ltd
•
Filing: 1956-01-20
•
Granted: 1958-05-06
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Expires: 1976-01-20
Abstract
No abstract record available.
Inventors
- 👤 Muckley Henry Edward
- 👤 Waldron John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:22
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1053; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/786
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1695069A
Cited
GB487926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |