US3553942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor for pliable sheet material
Assignee: Individual
•
Filing: 1968-02-26
•
Granted: 1971-01-12
•
Expires: 1988-02-26
Abstract
Abstract AN ANCHORING DEVICE FOR PLIABLE SHEET MATERIAL IN WHICH THE EDGE OF THE MATERIAL IS RELEASABLY GRIPPED IN A FRAME. ONE STRIP MEMBER, FORMING TE FRAME, HAS A CONVOLUTED BASE TERMINATING IN A FIXED TONGUE AND CARRIES A RESILIENT FLANGE CO-OPERATING WITH THE TONGUE TO FORM A SLOT. THE FLANGE IS MOVABLE IN ONE DIRECTION OBLIQUELY WITH RESPECT TO THE TONGUE TO EXPAND THE SLOT FOR INSERTION OF THE EDGE OF THE SHEET MATERIAL AND REDUCES THE SLOT WHEN MOVED IN THE OPPOSITE DIRECTION.
Inventors
- 👤 Frederick G Harrington
- 👤 John E Mullan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:54
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10
Claims Analysis
Total Claims: 0
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |