US4100329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting film
Assignee: Keuffel and Esser Co
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Filing: 1976-02-12
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Granted: 1978-07-11
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Expires: 1996-02-12
Abstract
Abstract Sheet material useful in the preparation of draftsmen's and engineers' plans and drawings comprises a base support, preferably of a stable polyester film, bearing a translucent pencil- and ink-receptive coating comprising finely-divided silica pigment dispersed throughout a binder matrix which is essentially a cross-polymerized reaction product of a mixture of a relatively low molecular weight acrylic or methacrylic ester vinyl monomer, a drying oil acrylate, and a blend of polyene and polythiol radiation curable polymers. The coating composition is substantially devoid of volatile solvent vehicle, yet is readily set to a functional drafting surface by exposure to actinic radiation, such as ultraviolet light.
Inventors
- 👤 William A. Neithardt, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:49
CPC Classifications
C; C09; C09D; C09D181/00; C09D181/02; C08; C08G; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C09D131/00; C09D131/02; C09D4/00; C09D4/06; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/151; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31533; Y10T428/31652; Y10T428/31667; Y10T428/31786; Y10T428/31794; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
43 words
Drafting sheet material comprising a sheet support having a coating thereon of a composition comprising finely-divided pigment dispersed throughout a binder matrix comprising a cross-polymerized reaction product of (a) an acrylic or methacrylic acid ester vinyl monomer and (b) a polyene/polythiol compound blend.
Claim 2
Dependent Claim
43 words
Drafting sheet material comprising a sheet support having a coating thereon of a composition comprising finely-divided pigment dispersed throughout a binder matrix comprising a cross-polymerized reaction product of (a) an acrylic or methacrylic acid ester vinyl monomer and (b) a polyene/polythiol compound blend.
Claim 3
Dependent Claim
19 words
Drafting sheet material according to claim 1 wherein said cross-polymerized binder matrix further comprises an epoxidized drying oil acrylate.
Claim 4
Dependent Claim
39 words
Drafting sheet material according to claim 2 wherein said coated composition comprises about 30% to 50% silica pigment, about 5% to 20% polyene/polythiol blend, about 25% to 60% vinyl monomer, and up to about 10% epoxidized drying oil acrylate.
Claim 5
Dependent Claim
23 words
Drafting sheet material according to claim 3 wherein said coated composition further comprises up to about 5% of a benzoin ether photosensitizing compound.
Claim 6
Dependent Claim
36 words
Drafting sheet material according to claim 3 wherein said vinyl monomer selected from the class consisting of trimethylolpropane triacrylate, 1,3-butyleneglycol diacrylate, 1,6-hexanediol diacrylate, neopentylglycol diacrylate, tetraethylene glycol diacrylate, ethylacrylate, 2-ethylhexyl acrylate, trimethylolpropane trimethacrylate and pentaerythritol triacrylate.
Claim 7
Independent Claim
67 words
The method of making a drafting sheet material which comprises applying to a sheet support a uniform coating of a fluid composition comprising about 30% to 50% finely-divided silica pigment, about 5% to 20% polyene/polythiol blend, about 25% to 60% vinyl monomer, and up to about 10% epoxidized drying oil acrylate; and exposing said coating to ultraviolet light for a time sufficient to solidify said fluid composition.
Claim 8
Independent Claim
67 words
The method of making a drafting sheet material which comprises applying to a sheet support a uniform coating of a fluid composition comprising about 30% to 50% finely-divided silica pigment, about 5% to 20% polyene/polythiol blend, about 25% to 60% vinyl monomer, and up to about 10% epoxidized drying oil acrylate; and exposing said coating to ultraviolet light for a time sufficient to solidify said fluid composition.
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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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |