US3106481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating tea bag paper to render it heat-sealable
Assignee: Individual
•
Filing: 1959-08-24
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Granted: 1963-10-08
•
Expires: 1979-08-24
Abstract
No abstract record available.
Inventors
- 👤 Sorg Adam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:52
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/46; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35; D21H21/00; D21H21/14; D21H21/18; D21H21/20; D21H23/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A METHOD OF FORMING A HEAT-SEALABLE WATER-PERMEABLE WEB OF POROUS FILTER PAPER WHICH COMPRISES PROVIDING A BODY OF THERMOPLASTIC SOLID MATERIAL SUBSTANTIALLY FREE FROM VOLATILE SOLVENTS, HEATING SAID THERMOPLASTIC MATERIAL TO A TEMPERATURE SUFFICIENTLY TO SOFTEN THE SAME, PASSING AN UNHEATED WEB OF SAID FILTER PAPER UNDERNEATH AND SUBSTANTIALLY IN CONTACT WITH SAID MATERIAL, EXERTING PRESSURE ON SAID MATERIAL SUFFICIENT TO CAUSE IT TO FLOW AND TO DEPOSIT ONTO SAID FILTER PAPER IN A PLURALITY OF SPACED LINES SAID LINES BEING SUBSTANTIALLY PARALLEL TO EACH OTHER, THE AREA OF SAID FILTER PAPER COVERED BY SAID LINES BEING NOT OVER ABOUT 25-35% OF THE TOTAL AREA, CHILLING THE UNDER SIDE OF SAID FILTER PAPER SIMULTANEOUSLY WITH THE DEPOSITION OF SAID LINES ON THE UPPER SIDE THEREOF TO PREVENT
Claim 2
Independent Claim
127 words
A METHOD OF FORMING A HEAT-SEALABLE WATER-PERMEABLE WEB OF POROUS FILTER PAPER WHICH COMPRISES PROVIDING A BODY OF THERMOPLASTIC SOLID MATERIAL SUBSTANTIALLY FREE FROM VOLATILE SOLVENTS, HEATING SAID THERMOPLASTIC MATERIAL TO A TEMPERATURE SUFFICIENTLY TO SOFTEN THE SAME, PASSING AN UNHEATED WEB OF SAID FILTER PAPER UNDERNEATH AND SUBSTANTIALLY IN CONTACT WITH SAID MATERIAL, EXERTING PRESSURE ON SAID MATERIAL SUFFICIENT TO CAUSE IT TO FLOW AND TO DEPOSIT ONTO SAID FILTER PAPER IN A PLURALITY OF SPACED LINES SAID LINES BEING SUBSTANTIALLY PARALLEL TO EACH OTHER, THE AREA OF SAID FILTER PAPER COVERED BY SAID LINES BEING NOT OVER ABOUT 25-35% OF THE TOTAL AREA, CHILLING THE UNDER SIDE OF SAID FILTER PAPER SIMULTANEOUSLY WITH THE DEPOSITION OF SAID LINES ON THE UPPER SIDE THEREOF TO PREVENT
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) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |