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Patent US2990555A successfully refreshed from Google Patents.
US2990555A
Expired / Lapsed
US
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Water closet tank ball seat
Assignee: Individual
•
Filing: 1957-06-10
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Granted: 1961-07-04
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Expires: 1977-06-10
Abstract
No abstract record available.
Inventors
- 👤 Vivien L Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:40
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; E03D1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1177443A
Cited
US1420452A
Cited
US1462106A
Cited
US1439268A
Cited
US2557743A
Cited
US2626399A
Cited
US2745109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |