US3282756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reproducing precision scales from a master by etching
Assignee: Northern Pump Co
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Filing: 1964-01-23
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Granted: 1966-11-01
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Expires: 1984-01-23
Abstract
No abstract record available.
Inventors
- 👤 Jr John B Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:21
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/02; G; G01; G01D; G01D13/00; G01D13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR PRODUCING STANDARD SCALES FROM A MASTER SCALE CONSISTING IN THE FOLLOWING STEPS: (A) APPLYING A RADIOACTIVE EMISSION MATERIAL TO THE GRADUATIONS OF A MASTER SCALE; (B) PROVIDING MATERIAL FROM WHICH A SCALE IS TO BE PRODUCED AND COATING AT LEAST ONE SURFACE THEREOF WITH A PHOTOSENSITIVE RESIST MATERIAL; (C) EXPOSING SAID RESIST MATERIAL BY PLACING THE SAME IN FACE-TO-FACE CONTACT WITH SAID RADIOACTIVE EMITTING MATERIAL; (D) DEVELOPING SAID PHOTOSENSITIVE RESIST MATERIAL TO PRODUCE A PLURALITY OF RAISED RESIST MATERIAL LINES ON THE SCALE MATERIAL AND THEREAFTER, (E) ETCHING THE SCALE MATERIAL TO PRODUCE A STANDARD SCALE WITH GRADUATIONS LOCATED THEREON IN CORRESPONDING LOCATION TO THE GRADUATIONS OF THE MASTER SCALE.
Claim 2
Dependent Claim
113 words
A PROCESS FOR PRODUCING STANDARD SCALES FROM A MASTER SCALE CONSISTING IN THE FOLLOWING STEPS: (A) APPLYING A RADIOACTIVE EMISSION MATERIAL TO THE GRADUATIONS OF A MASTER SCALE; (B) PROVIDING MATERIAL FROM WHICH A SCALE IS TO BE PRODUCED AND COATING AT LEAST ONE SURFACE THEREOF WITH A PHOTOSENSITIVE RESIST MATERIAL; (C) EXPOSING SAID RESIST MATERIAL BY PLACING THE SAME IN FACE-TO-FACE CONTACT WITH SAID RADIOACTIVE EMITTING MATERIAL; (D) DEVELOPING SAID PHOTOSENSITIVE RESIST MATERIAL TO PRODUCE A PLURALITY OF RAISED RESIST MATERIAL LINES ON THE SCALE MATERIAL AND THEREAFTER, (E) ETCHING THE SCALE MATERIAL TO PRODUCE A STANDARD SCALE WITH GRADUATIONS LOCATED THEREON IN CORRESPONDING LOCATION TO THE GRADUATIONS OF THE MASTER SCALE.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |