US3448772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste pipe plug
Assignee: Individual
•
Filing: 1966-04-18
•
Granted: 1969-06-10
•
Expires: 1986-04-18
Abstract
No abstract record available.
Inventors
- 👤 William B Delamater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:44
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/13; F16L55/11; F16L55/1141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2487635A
Cited
US2974685A
Cited
US2968047A
Cited
US3156373A
Cited
US3200984A
Cited
US3291156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |