US3733025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy opening envelope
Assignee: Tension Envelope Corp
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Filing: 1971-06-10
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Granted: 1973-05-15
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Expires: 1991-06-10
Abstract
Abstract The seal flap of an envelope has a portion reinforced by folding and adhesive connection, the reinforced portion being divided from the remainder of the seal flap by a line of tear perforations. A releaseable adhesive connection is made between the outside of said portion and the back of the envelope whereby said portion may be peeled across the back of the envelope to open same.
Inventors
- 👤 W Hiersteiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:52
CPC Classifications
B; B65; B65D; B65D27/00; B65D27/32; B65D27/34; B65D27/12; B65D27/14; B65D27/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
189 words
An envelope comprising: a. a front panel having an upper edge, a back panel Substantially overlapping said front panel and defining a pocket therebetween opening toward said upper edge, b. a pocket closure flap joined to said panel upper edge and having a length normal to said upper edge sufficient to overlap said back panel when folded down, said closure flap including the integral first, second and third body portions extending longitudinally of said upper edge, said first body portion being adjacent said upper edge, c. a tear line dividing said first body portion and second body portion, said third body portion being folded into overlapping relation to said second body portion and having a free edge adjacent said tear line and a side edge projecting laterally beyond said second body portion and directed toward the beginning of said tear line, said second and third body portions being secured together forming a tear strip, and d. releaseable adhering means positioned between said tear strip and said back panel when said closure flap is folded down, said adhering means being operably spaced inwardly of said third body portion side edge.
Claim 2
Dependent Claim
189 words
An envelope comprising: a. a front panel having an upper edge, a back panel Substantially overlapping said front panel and defining a pocket therebetween opening toward said upper edge, b. a pocket closure flap joined to said panel upper edge and having a length normal to said upper edge sufficient to overlap said back panel when folded down, said closure flap including the integral first, second and third body portions extending longitudinally of said upper edge, said first body portion being adjacent said upper edge, c. a tear line dividing said first body portion and second body portion, said third body portion being folded into overlapping relation to said second body portion and having a free edge adjacent said tear line and a side edge projecting laterally beyond said second body portion and directed toward the beginning of said tear line, said second and third body portions being secured together forming a tear strip, and d. releaseable adhering means positioned between said tear strip and said back panel when said closure flap is folded down, said adhering means being operably spaced inwardly of said third body portion side edge.
Claim 3
Dependent Claim
26 words
The envelope as set forth in claim 1 wherein: a. said third body portion side edge is curved inwardly toward the beginning of said tear line.
Claim 4
Dependent Claim
34 words
The envelope as set forth in claim 1 wherein: a. said first body portion and said second body portion have side extremities tapering inwardly of the envelope toward the beginning of said tear line.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |