US4173075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engraver's template
Assignee: Rio Tinto Switzerland AG
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Filing: 1978-01-16
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Granted: 1979-11-06
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Expires: 1998-01-16
Abstract
Abstract An engravers template having a desired pattern therein with engraved portions and raised portions. An aluminum sheet is provided having an aluminum oxide layer on one side and a plastic layer on the opposite side. The desired engraved pattern is etched through the oxide layer and through the aluminum sheet.
Inventors
- 👤 John V. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:31
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/20; G03F7/2002; G03F7/2014; G03F7/2016
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
An engravers template having a desired pattern therein with engraved portions and raised portions comprising a metal sheet having a thickness from about 0.005 to 0.20" and having an oxide layer on one side having a thickness from about 0.0004 to 0.001" and a plastic layer on the opposite side adhered thereto having a thickness from about 0.01 to 1.0", wherein the desired engraved pattern is etched through the oxide layer and through the metal sheet to provide an integral plastic-metal engravers template having said desired pattern etched into the metal sheet and supported by said adhered plastic layer.
Claim 2
Dependent Claim
99 words
An engravers template having a desired pattern therein with engraved portions and raised portions comprising a metal sheet having a thickness from about 0.005 to 0.20" and having an oxide layer on one side having a thickness from about 0.0004 to 0.001" and a plastic layer on the opposite side adhered thereto having a thickness from about 0.01 to 1.0", wherein the desired engraved pattern is etched through the oxide layer and through the metal sheet to provide an integral plastic-metal engravers template having said desired pattern etched into the metal sheet and supported by said adhered plastic layer.
Claim 3
Dependent Claim
20 words
A template according to claim 1 wherein the metal sheet is aluminum and wherein the oxide layer is aluminum oxide.
Claim 4
Dependent Claim
23 words
A template according to claim 2 wherein the desired engraved pattern is etched completely through the aluminum sheet down to the plastic layer.
Claim 5
Dependent Claim
27 words
A template according to claim 2 including a second aluminum sheet bonded to the plastic layer, said second aluminum sheet having a second aluminum oxide layer thereon.
Claim 6
Dependent Claim
20 words
A template according to claim 4 wherein said second aluminum oxide layer has a readily removable, protective plastic layer thereon.
Claim 7
Dependent Claim
19 words
A template according to claim 2 wherein the engraved portions comprise a plurality of spaced grooves of uniform width.
Claim 8
Dependent Claim
13 words
A template according to claim 2 wherein the aluminum oxide layer is colored.
Claim 9
Dependent Claim
23 words
A template according to claim 7 wherein the plastic layer is colored in a color contrasting to the color of the oxide layer.
References Cited (Backward Citations)
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Cited
US2731333A
Cited
US3089800A
Cited
US3139003A
Cited
US3393453A
Cited
US3720143A
Cited
US4030967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |