US3426487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basement drainage system
Assignee: DENNIS D FORTE
•
Filing: 1967-03-24
•
Granted: 1969-02-11
•
Expires: 1987-03-24
Abstract
No abstract record available.
Inventors
- 👤 Dennis D Forte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:44
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/70; E04B1/7023; E02; E02D; E02D31/00; E02D31/02; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966; Y10T137/6969; Y10T137/698
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1891934A
Cited
CH158163A
Cited
DE642803C
Cited
US2147035A
Cited
US2410338A
Cited
US2717513A
Cited
US3017722A
Cited
US3057285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |