Patent US3411899A successfully refreshed from Google Patents.
US3445973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable cover for drain fixture
Assignee: Individual
•
Filing: 1967-02-01
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Granted: 1969-05-27
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Expires: 1987-02-01
Abstract
No abstract record available.
Inventors
- 👤 Robert E Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:44
CPC Classifications
E; E03; E03F; E03F7/00; E03F7/02; E03F5/00; E03F5/04; E03F5/0407
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189918698A
Cited
US797585A
Cited
US1912312A
Cited
US1973304A
Cited
US2895634A
Cited
US2936092A
Cited
US3253730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |