Patent US3650463A successfully refreshed from Google Patents.
US3650463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained envelope opening strip
Assignee: Individual
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Filing: 1970-02-18
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Granted: 1972-03-21
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Expires: 1990-02-18
Abstract
Abstract A mailing envelope having self-contained opening means comprising at least one row of perforations extending through the front face, the end flaps and the closure flap. The perforations extend along the top marginal edge of the envelope closely adjacent the fold line which forms the closure flap, and terminate in a pull tab formed along a line cut inwardly from one end of the envelope.
Inventors
- 👤 Deryl R Christiansen
- 👤 Jack R Christiansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:13
CPC Classifications
B; B65; B65D; B65D27/00; B65D27/32; B65D27/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
An envelope comprising a single sheet of material folded along lines defining a front panel formed integral with a rear panel and integral with end flaps and with a closure flap, the top external marginal edge of said rear panel having a strip of adhesive therealong, said front panel extending above the top edge of said rear panel and said closure flap being foldable downwardly thereover toward said adhesive along the top edge of said rear panel, the free marginal portion of said closure flap having a strip of adhesive therealong for sealing engagement with said first mentioned strip along the top marginal edge of said rear panel thereby leaving a nonadhesive space between said rear panel and said closure flap above their respective strips of adhesive, said nonadhesive space having parallel lines of perforations therealong, and said lines of perforations severed inwardly from one of their ends to form a free pull-tab between said lines.
Claim 2
Dependent Claim
156 words
An envelope comprising a single sheet of material folded along lines defining a front panel formed integral with a rear panel and integral with end flaps and with a closure flap, the top external marginal edge of said rear panel having a strip of adhesive therealong, said front panel extending above the top edge of said rear panel and said closure flap being foldable downwardly thereover toward said adhesive along the top edge of said rear panel, the free marginal portion of said closure flap having a strip of adhesive therealong for sealing engagement with said first mentioned strip along the top marginal edge of said rear panel thereby leaving a nonadhesive space between said rear panel and said closure flap above their respective strips of adhesive, said nonadhesive space having parallel lines of perforations therealong, and said lines of perforations severed inwardly from one of their ends to form a free pull-tab between said lines.
References Cited (Backward Citations)
US1720721A
Cited
US1888313A
Cited
US2227679A
Cited
US2215989A
Cited
US2310371A
Cited
US2549199A
Cited
US3318510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |