US3561808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device
Assignee: Stoffel Seals Corp
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Filing: 1968-04-22
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Granted: 1971-02-09
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Expires: 1988-04-22
Abstract
Abstract A TAMPER-PROOF SEAL OF SHEET MATERIAL HAVING A FLAP ADAPTED TO BE INSERTED INTO AN APERTURE OF THE SEAL AND FOLDABLE IN ONE DIRECTION OF ROTATION FOR INSERTION INTO THE APERTURE WHEREBY THE FLAP HAS TO BE ROTATED IN THE OPPOSITE DIRECTION APPROXIMATELY 270* TO ATTACH THE SEAL AND WHEREIN WEAKENED ZONES ARE PROVIDED IN THE ARE CONNECTING THE FLAP WITH THE SEAL TO ASSURE BREAKAGE OF THE FLAP IN CASE OF TAMPERING, WHEREBY A ROTATION IN THE ONE DIRECTION OF ABOUT 180* IS REQUIRED TO OPEN THE SEAL.
Inventors
- 👤 John H Beier
- 👤 Henry Nierhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:15
CPC Classifications
B; B65; B65D; B65D77/00; B65D77/10; B65D77/16; B65D77/18; B65D77/185; Y; Y10; Y10T; Y10T24/00; Y10T24/15; Y10T292/00; Y10T292/48; Y10T292/491
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |