Patent US2831783A successfully refreshed from Google Patents.
US2831783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracing sheet
Assignee: —
•
Filing: —
•
Granted: 1958-04-22
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Expires: 1975-04-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:08
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/18; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A TRANSLUCENT SHEET SUITABLE FOR USE AS A TRACING SHEET COMPRISING A THIN, DOUBLY ORIENTED, TRANSPARENT FILM OF A SYNTHETIC RESIN, AND A THIN SURFACE COATING ON THE FILM TO IMPART TO THE FILM THE ABILITY TO TAKE INK AND PENCIL MARKS SATISFACTORILY AND TO ENABLE READY ERASURE OF SUCH MARKS, THE SURFACE COATING COMPRISING ESSENTILLY A CURED RESINOUS COMPOSITION OF FROM 10 TO 65 PARTS BY WEIGHT OF AN ELASTOMERIC ACRYLIC COPOLYMER RESIN, FROM 40 PARTS TO 88 PARTS BY WEIGHT OF AT LEAST ONE RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ACETATE AND PARTIALLY HYDROLYZED POLYVINYL ACETATE, AND 60 TO 12 PARTS BY WEIGHT OF A HEAT HARDENABLE PHENOLIC RESIN, SAID PHENOLIC RESIN COMPRISING THE ALKALI CATALYZED REACTION PRODUCT OF 1 MOL OF AN ALDEHYDE AND FROM 0.8 TO 2 MOLS OF A PHENOL, AND THE SURFACE COATING ALSO COMPRISING FINELY DIVIDED INORGANIC SOLIDS OF A FINENESS TO PASS THROUGH A 325 MESH SIEVE, IN AN AMOUNT TO PROVIDE NOT OVER 65 PARTS BY WEIGHT OF BOTH THE INORGANIC SOLIDS AND ACRYLIC COPOLYMER RESIN IN THE COATING.
Claim 2
Dependent Claim
180 words
A TRANSLUCENT SHEET SUITABLE FOR USE AS A TRACING SHEET COMPRISING A THIN, DOUBLY ORIENTED, TRANSPARENT FILM OF A SYNTHETIC RESIN, AND A THIN SURFACE COATING ON THE FILM TO IMPART TO THE FILM THE ABILITY TO TAKE INK AND PENCIL MARKS SATISFACTORILY AND TO ENABLE READY ERASURE OF SUCH MARKS, THE SURFACE COATING COMPRISING ESSENTILLY A CURED RESINOUS COMPOSITION OF FROM 10 TO 65 PARTS BY WEIGHT OF AN ELASTOMERIC ACRYLIC COPOLYMER RESIN, FROM 40 PARTS TO 88 PARTS BY WEIGHT OF AT LEAST ONE RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ACETATE AND PARTIALLY HYDROLYZED POLYVINYL ACETATE, AND 60 TO 12 PARTS BY WEIGHT OF A HEAT HARDENABLE PHENOLIC RESIN, SAID PHENOLIC RESIN COMPRISING THE ALKALI CATALYZED REACTION PRODUCT OF 1 MOL OF AN ALDEHYDE AND FROM 0.8 TO 2 MOLS OF A PHENOL, AND THE SURFACE COATING ALSO COMPRISING FINELY DIVIDED INORGANIC SOLIDS OF A FINENESS TO PASS THROUGH A 325 MESH SIEVE, IN AN AMOUNT TO PROVIDE NOT OVER 65 PARTS BY WEIGHT OF BOTH THE INORGANIC SOLIDS AND ACRYLIC COPOLYMER RESIN IN THE COATING.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |