US3250637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: AB Dick Co
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Filing: 1961-07-07
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Granted: 1966-05-10
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Expires: 1981-07-07
Abstract
No abstract record available.
Inventors
- 👤 Paul E Frasher
- 👤 Abraham D Davis
- 👤 Hersh A Platkevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:44
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/14; B41C1/148; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A HEAT STENCILIZABLE STENCIL COMPRISING A BASE SHEET HAVING A WEIGHT OF 4 TO 5 POUNDS PER 3,000 SQUARE FEET, A THICKNESS OF FROM 0.8 TO 1.2 MILS AND A MINIMUM POROSITY OF 200 CU. FT/SQ. FT./MIN., AND A COATING ON SAID BASE SHEET UNIFORMLY APPLIED IN AMOUNTS OF FROM 4 TO 10 POUNDS PER 3,000 SQUARE FEET, SAID COATING CONSISTING ESSENTIALLY OF FROM 61 TO 89% OF A WAX HAVING A MELTING POINT FROM 160 TO 210*F., AND A HARDNESS OF FROM 5 TO 10 (100 GR./ 77*F./5 SEC.), FROM 10 TO 35% OF A PARAFFIN WAX AND FROM 1 TO 4% OF A WAX SOLUBLE POLYMER.
Claim 2
Dependent Claim
108 words
A HEAT STENCILIZABLE STENCIL COMPRISING A BASE SHEET HAVING A WEIGHT OF 4 TO 5 POUNDS PER 3,000 SQUARE FEET, A THICKNESS OF FROM 0.8 TO 1.2 MILS AND A MINIMUM POROSITY OF 200 CU. FT/SQ. FT./MIN., AND A COATING ON SAID BASE SHEET UNIFORMLY APPLIED IN AMOUNTS OF FROM 4 TO 10 POUNDS PER 3,000 SQUARE FEET, SAID COATING CONSISTING ESSENTIALLY OF FROM 61 TO 89% OF A WAX HAVING A MELTING POINT FROM 160 TO 210*F., AND A HARDNESS OF FROM 5 TO 10 (100 GR./ 77*F./5 SEC.), FROM 10 TO 35% OF A PARAFFIN WAX AND FROM 1 TO 4% OF A WAX SOLUBLE POLYMER.
References Cited (Backward Citations)
US1168223A
Cited
US2808777A
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US2756161A
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US2858236A
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US2877196A
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US2927039A
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US2999765A
Cited
US3062675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |