Patent US3775922A successfully refreshed from Google Patents.
US3775922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retainer and attachment means
Assignee: Individual
•
Filing: 1970-12-16
•
Granted: 1973-12-04
•
Expires: 1990-12-16
Abstract
Abstract THE INVENTION PROVIDES FORMWORK, FOR CONCRETE STRUCTURES, OF THE TYPE CAPABLE OF BEING INTERLOCKED WITH ADJACENT FORMWORK MEMBERS ALONG ADJACENT LONGITUDINAL EDGES AND TO BE LEFT IN POSITION AFTER THE CONCRETE HAS SET SO AS TO CONSTITUTE CLADDING FOR THE CONCRETE, WHEREIN THERE ARE RETAINER MEANS FOR INTERLOCKING ENGAGEMENT WITH THE FORMWORK, SAID RETAINER MEANS HAVING A RETAINER MEMBER ADAPTED TO RESIST DISENGAGEMENT OF ADJACENT FORMWORK MEMBERS AND HAVING VOID-FORMING MEANS FOR PROVIDING A CONCRETE VOID WHEREBY A FASTENER MAY BE ENGAGED WITH THE FORMWORK WITHOUT INTO ENGAGEMENT WITH THE CONCRETE.
Inventors
- 👤 R Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:32
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; E04B1/41; E04B1/4171; E04B5/00; E04B5/16; E04B5/32; E04B5/36; E04B5/38; E04B5/40; E04G; E04G15/00; E04G15/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |