US3017722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination hollow footing stringer and foundation drain duct
Assignee: Individual
•
Filing: 1958-02-28
•
Granted: 1962-01-23
•
Expires: 1978-02-28
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:36
CPC Classifications
E; E02; E02D; E02D31/00; E02D31/02; E02B; E02B11/00; E02B11/005; E04; E04B; E04B1/00; E04B1/62; E04B1/70; E04B1/7023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US460352A
Cited
US1170215A
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US1460014A
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US1734777A
Cited
US2153790A
Cited
US2146775A
Cited
US2147035A
Cited
US2314424A
Cited
US2410338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |