Patent US3444694A successfully refreshed from Google Patents.
US3444694A
Expired / Lapsed
US
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Curvilinear terrace construction and planter blocks and methods therefor
Assignee: Individual
•
Filing: 1967-10-25
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Granted: 1969-05-20
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Expires: 1987-10-25
Abstract
No abstract record available.
Inventors
- 👤 Leon Frehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:08
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/02; E02D29/025; A; A01; A01G; A01G9/00; A01G9/02; A01G9/022; A01G9/025; E04; E04C; E04C1/00; E04C1/39; E04C1/395; Y; Y02; Y02P; Y02P60/00; Y02P60/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |