US3436197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Escaped gas venting apparatus
Assignee: KENNETH C BORST
•
Filing: 1967-09-13
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Granted: 1969-04-01
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Expires: 1987-09-13
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Borst
- 👤 Roscoe C Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:18
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/07; F17; F17D; F17D5/00; F17D5/02; F16L2101/00; F16L2101/30; Y; Y10; Y10T; Y10T137/00; Y10T137/5762
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |