US2698441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonplugging drain cap
Assignee: Individual
•
Filing: 1952-01-28
•
Granted: 1955-01-04
•
Expires: 1972-01-28
Abstract
No abstract record available.
Inventors
- 👤 Agnes L Shobe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:00
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/26; E03C1/264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US780341A
Cited
CH42995A
Cited
US938607A
Cited
US1233272A
Cited
GB135767A
Cited
US1530722A
Cited
US1560741A
Cited
US2491336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |