Patent US4801074A successfully refreshed from Google Patents.
US4801074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed letter
Assignee: JYONI BUSINESS FORMS Co Ltd NO 1-19 KANDANISHIKI-CHO CHIYODA-KU TOKYO JAPAN
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Filing: 1987-01-27
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Granted: 1989-01-31
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Expires: 2007-01-27
Abstract
Abstract The invention relates to an envelope having a transparent layer, allowing printed information on the letter paper in the envelope to appear through the envelope. The inner surface of the transparent layer is laminated with a transparent, thermal adhering synthetic resin film to bind the transparent layer to a second layer along their periphery.
Inventors
- 👤 Etsujiro Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:25
CPC Classifications
B; B42; B42D; B42D15/00; B42D15/02; B42D15/04; B42D15/08; B65; B65D; B65D27/00; B65D27/04; B65D75/00; B65D75/04; B65D75/20; B65D75/28; B65D75/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
A sealed letter characterized in that the letter paper on which an address or other descriptive matters are printed is covered, (1) on its front surface with a long, continuous front sheet made of transparent paper which is laminated on its rear surface with a transparent and thermal adhering synthetic resin film and, (2) on its rear surface with a long, continuous rear sheet made of a paper material, wherein the front sheet and the rear sheet are adhered together by heat at their peripheral portions to form an enclosed sealed portion.
Claim 2
Dependent Claim
92 words
A sealed letter characterized in that the letter paper on which an address or other descriptive matters are printed is covered, (1) on its front surface with a long, continuous front sheet made of transparent paper which is laminated on its rear surface with a transparent and thermal adhering synthetic resin film and, (2) on its rear surface with a long, continuous rear sheet made of a paper material, wherein the front sheet and the rear sheet are adhered together by heat at their peripheral portions to form an enclosed sealed portion.
Claim 3
Dependent Claim
21 words
A sealed letter as claimed in claim 1, wherein the transparent paper constituting the front sheet is made of glassine paper.
Claim 4
Dependent Claim
33 words
A sealed letter as claimed in claim 1, wherein the rear sheet is made of transparent paper laminated, at least at its front surface, with a transparent and thermal adhering synthetic resin film.
Claim 5
Dependent Claim
27 words
A sealed letter as claimed in claim 3, wherein the transparent paper constituting the rear sheet is provided on its rear surface with a synthetic resin film.
Claim 6
Dependent Claim
17 words
A sealed letter as claimed in claim 1, wherein the rear sheet is made of opaque paper.
Claim 7
Dependent Claim
25 words
A sealed letter as claimed in cliam 5, wherein the opaque paper is provided on its front surface with a synthetic thermal adhering resin film.
Claim 8
Dependent Claim
23 words
A sealed letter as claimed in claim 6, wherein the opaque paper is provided on its rear surface with a synthetic resin film.
Claim 9
Dependent Claim
17 words
A sealed letter as claimed in claim 1, wherein the letter paper is in a folded condition.
References Cited (Backward Citations)
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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) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |