Patent US3453029A successfully refreshed from Google Patents.
US3453029A
Expired / Lapsed
US
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Pressure sensitive metering valve
Assignee: Midland Ross Corp
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Filing: 1967-08-31
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Granted: 1969-07-01
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Expires: 1987-08-31
Abstract
No abstract record available.
Inventors
- 👤 Kenneth B Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:20
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/28; B60T11/34; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7837; Y10T137/7904; Y10T137/7905
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |