Patent US3280569A successfully refreshed from Google Patents.
US3280569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Groin
Assignee: PERMAGROIN CO Inc
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Filing: 1964-02-11
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Granted: 1966-10-25
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Expires: 1984-02-11
Abstract
No abstract record available.
Inventors
- 👤 William B Wosenitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:01
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PERMEABLE GROIN OF THE CHARACTER DESCRIBED COMPRISING, AN ELONGATED BOX-LIKE STRUCTURE COMPOSED OF A PLURALITY OF UNITS PLACED IN END-TO-END RELATION AND DEFINING A TUNNEL THROUGH THEM, EACH UNIT CONSISTING OF A PAIR OF SUBSTANTIALLY IDENTICAL WALL-FORMING SECTIONS OF MOLDED CONCRETE, THE SIDE WALLS OF SAID SECTIONS HAVING A MULTIPLICITY OF OPENINGS THROUGH THEM, THE GROIN BEING CLOSED AT THE TOP BY A SLAB AND ALSO CLOSED AT THE BOTTOM BY A SIMILAR SLAB, SAID SLABS BEING ANCHORED TO THE WALL-FORMING SECTIONS, EACH OF THE WALL-FORMING SECTIONS HAVING USHAPED LEGS AT ITS ENDS, THE LEGS ON ONE WALL-FORMING SECTION BEING IN ABUTTING RELATION WITH THE LEGS ON THE OPPOSITE SECTION TO PROVIDE FOR SPACING BETWEEN THE WALLS OF THE
Claim 2
Dependent Claim
120 words
A PERMEABLE GROIN OF THE CHARACTER DESCRIBED COMPRISING, AN ELONGATED BOX-LIKE STRUCTURE COMPOSED OF A PLURALITY OF UNITS PLACED IN END-TO-END RELATION AND DEFINING A TUNNEL THROUGH THEM, EACH UNIT CONSISTING OF A PAIR OF SUBSTANTIALLY IDENTICAL WALL-FORMING SECTIONS OF MOLDED CONCRETE, THE SIDE WALLS OF SAID SECTIONS HAVING A MULTIPLICITY OF OPENINGS THROUGH THEM, THE GROIN BEING CLOSED AT THE TOP BY A SLAB AND ALSO CLOSED AT THE BOTTOM BY A SIMILAR SLAB, SAID SLABS BEING ANCHORED TO THE WALL-FORMING SECTIONS, EACH OF THE WALL-FORMING SECTIONS HAVING USHAPED LEGS AT ITS ENDS, THE LEGS ON ONE WALL-FORMING SECTION BEING IN ABUTTING RELATION WITH THE LEGS ON THE OPPOSITE SECTION TO PROVIDE FOR SPACING BETWEEN THE WALLS OF THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |