Patent US3879875A successfully refreshed from Google Patents.
US3879875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stamp mount envelope
Assignee: WASHINGTON STAMP EXCHANGE Inc
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Filing: 1974-05-02
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Granted: 1975-04-29
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Expires: 1994-05-02
Abstract
Abstract A protective envelope for mounting a stamp in a collector''s book has a background mounting strip and a transparent cover strip extending past the background strip along one edge to form a flap which can be picked up and bowed outwardly to expose an underlying portion of the background strip and form a wide opening for the insertion of and removal of a stamp. The two strips are made of plastic and are heat-sealed along their edges, but the heat-sealing is not extended to the bottom corners of the envelope so that the corner serrations of the stamp are not distorted and so that air vents are provided to preserve the stamps from drying out and to permit escape of air without displacing the stamps when the envelopes are compressed by the grip of the hand or by the collector''s book being suddenly closed.
Inventors
- 👤 Henry G Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:19
CPC Classifications
B; B42; B42F; B42F5/00; B42F5/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
An envelope for mounting a stamp in a collector''s book comprising a background plastic strip having top, side and bottom edges, a cover plastic strip overlying said background strip and extending beyond the top edge thereof to form a flap along the open end of the envelope, and heat-sealing lines impressed into said strips along side and bottom edges of the envelope wherein said heat-sealing lines are terminated short of reaching the top edge of said background strip to cause said flap to expose a border portion of the background strip at the open end of the envelope when the flap is picked up at its outer edge and bowed outwardly to insert or remove a stamp.
Claim 2
Dependent Claim
117 words
An envelope for mounting a stamp in a collector''s book comprising a background plastic strip having top, side and bottom edges, a cover plastic strip overlying said background strip and extending beyond the top edge thereof to form a flap along the open end of the envelope, and heat-sealing lines impressed into said strips along side and bottom edges of the envelope wherein said heat-sealing lines are terminated short of reaching the top edge of said background strip to cause said flap to expose a border portion of the background strip at the open end of the envelope when the flap is picked up at its outer edge and bowed outwardly to insert or remove a stamp.
Claim 3
Dependent Claim
95 words
The stamp envelope set forth in claim 1 wherein said heat-sealing is terminated short of reaching the bottom corners of the envelope, leaving unsealed overlying plastic portions at said bottom corners to provide openings for safeguarding the corner serrations of the stamp and for providing venting through the envelope to prevent the stamps from drying out and to permit air escape substantially equalizing the air escape at the open end of the envelope when the envelope is compressed suddenly by a sudden grip of the hand or by a sudden closing of a collector''s book.
Claim 4
Dependent Claim
39 words
The stamp envelope set forth in claim 2 wherein only the heat-sealing line along the bottom edge is terminated short of reaching the side heat-sealing lines so that said vent openings are opposite the open end of the envelope.
Claim 5
Dependent Claim
36 words
The stamp envelope set forth in claim 1 wherein said background Strip is of a thin, opaque, plastic material and said cover strip is of thin, transparent, plastic material both in the same range of thickness.
Claim 6
Dependent Claim
55 words
The stamp envelope set forth in claim 1 wherein said background strip is of an opaque, black material and is provided with a pressure-sensitive adhesive coating on its back side covered by a releasable liner which is removed when the envelope is to be placed into adhesive contact with a page of a collector''s book.
Claim 7
Dependent Claim
151 words
An envelope for mounting a stamp in a collector''s book comprising a background plastic strip having top, side and bottom edges, a cover plastic strip overlying said background strip and extending beyond the top edge thereof to form a flap along an open end of the envelope, and heat-sealing lines impressed into said strip to close the envelope along the side and bottom edges thereof wherein said heat-sealing along said bottom edge of the envelope is terminated short of reaching the bottom corners of the envelope whereby to leave vent openings in said bottom edge opposite said open end of the envelope providing space to safeguard the corner serrations of the stamp and providing air venting through the envelope to preserve the stamps from drying out and to permit air escape at the bottom, equalizing substantially the escape at the open end of the envelope when the envelope is suddenly compressed.
Claim 8
Dependent Claim
151 words
An envelope for mounting a stamp in a collector''s book comprising a background plastic strip having top, side and bottom edges, a cover plastic strip overlying said background strip and extending beyond the top edge thereof to form a flap along an open end of the envelope, and heat-sealing lines impressed into said strip to close the envelope along the side and bottom edges thereof wherein said heat-sealing along said bottom edge of the envelope is terminated short of reaching the bottom corners of the envelope whereby to leave vent openings in said bottom edge opposite said open end of the envelope providing space to safeguard the corner serrations of the stamp and providing air venting through the envelope to preserve the stamps from drying out and to permit air escape at the bottom, equalizing substantially the escape at the open end of the envelope when the envelope is suddenly compressed.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |