US2988098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually operated gas controllers
Assignee: Vaillant GmbH
•
Filing: 1959-12-08
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Granted: 1961-06-13
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Expires: 1979-12-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:21
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/107; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516; Y10T137/8593; Y10T137/86919
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |