US3675844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Envelope with sealing means
Assignee: Sterling Coated Materials Ltd
•
Filing: 1970-03-09
•
Granted: 1972-07-11
•
Expires: 1990-03-09
Abstract
Abstract A sealing strip which is particularly useful for securing two layers of paper together, for example sealing the flap of an envelope, which consists of a paper carrier of low internal strength coated on both sides with a pressure-sensitive adhesive. One or both adhesive surfaces may be protected with a removable strip of paper or plastics material.
Inventors
- 👤 Stanley Edward Sorrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:37
CPC Classifications
B; B65; B65D; B65D27/00; B65D27/12; B65D27/14; B65D27/16; Y; Y10; Y10S; Y10S206/00; Y10S206/813; Y10T; Y10T428/00; Y10T428/14; Y10T428/24; Y10T428/24752; Y10T428/24769; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
In combination a sealing means comprising a thin paper carrier which is coated on both sides with a layer of pressuresensitive material and an envelope having a flap, said sealing means being secured to the body of the envelope in the region adapted to be overlaid by the flap, said paper carrier having an internal strength which is less than the adhesive force between a layer of said pressure-sensitive material and said paper carrier, between a layer of said pressure-sensitive material and said body of the envelope, and between a layer of said pressure-sensitive material and said flap.
Claim 2
Dependent Claim
98 words
In combination a sealing means comprising a thin paper carrier which is coated on both sides with a layer of pressuresensitive material and an envelope having a flap, said sealing means being secured to the body of the envelope in the region adapted to be overlaid by the flap, said paper carrier having an internal strength which is less than the adhesive force between a layer of said pressure-sensitive material and said paper carrier, between a layer of said pressure-sensitive material and said body of the envelope, and between a layer of said pressure-sensitive material and said flap.
Claim 3
Dependent Claim
27 words
The combination of claim 1, in which the outer face of the sealing means is covered by a release means to prevent premature sealing of the envelope.
Claim 4
Dependent Claim
22 words
The combination of claim 2, in which the release means is of slightly greater width than the width of the paper carrier.
Claim 5
Dependent Claim
32 words
The combination of claim 3, in which the paper carrier is of low internal strength and is manufactured from a substance selected from the group consisting of mechanical wood and sulphite pulp.
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |