US3095340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision resistor making by resistance value control for etching
Assignee: Individual
•
Filing: 1961-08-21
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Granted: 1963-06-25
•
Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 David P Triller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:42
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; H01C17/2416; H05; H05K; H05K1/00; H05K1/16; H05K1/167; H05K1/02; H05K1/0266; H05K1/0268; H05K2201/00; H05K2201/03; H05K2201/0302; H05K2201/0317; H05K2203/00; H05K2203/17; H05K2203/171; H05K3/00; H05K3/02; H05K3/06; H05K3/061; H05K3/064; Y; Y10; Y10S; Y10S428/00; Y10S428/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD OF PRODUCING PRECISION RESISTORS COMPRISING: DEPOSITING A RESISTANCE FILM ON FIRST AND SECOND AREAS OF AN INSULATED BASE, THEN COATING AT LEAST SAID SECOND AREA WITH A PHOTOSENSITIVE MATERIAL, THEN COMPARING THE RESISTANCE VALUE OF SAID FIRST AREA WITH A PREDETERMINED RESISTANCE VALUE, THEN PROJECTING A LIGHT PATTERN ONTO SAID PHOTOSENSITIVE MATERIAL OF A SIZE DETERMINED BY THE RESISTANCE VALUE OF SAID FIRST AREA THEREBY HARDENING A PORTION OF SAID PHOTOSENSITIVE MATERIAL, AND THEN ETCHING THE AREAS OF SAID SECOND AREA THAT ARE NOT COVERED BY SAID HARDENED PHOTOSENSITIVE MATERIAL THEREBY FORMING A PLURALITY OF PRECISION RESISTORS ON SAID INSULATED BASE.
Claim 2
Independent Claim
103 words
A METHOD OF PRODUCING PRECISION RESISTORS COMPRISING: DEPOSITING A RESISTANCE FILM ON FIRST AND SECOND AREAS OF AN INSULATED BASE, THEN COATING AT LEAST SAID SECOND AREA WITH A PHOTOSENSITIVE MATERIAL, THEN COMPARING THE RESISTANCE VALUE OF SAID FIRST AREA WITH A PREDETERMINED RESISTANCE VALUE, THEN PROJECTING A LIGHT PATTERN ONTO SAID PHOTOSENSITIVE MATERIAL OF A SIZE DETERMINED BY THE RESISTANCE VALUE OF SAID FIRST AREA THEREBY HARDENING A PORTION OF SAID PHOTOSENSITIVE MATERIAL, AND THEN ETCHING THE AREAS OF SAID SECOND AREA THAT ARE NOT COVERED BY SAID HARDENED PHOTOSENSITIVE MATERIAL THEREBY FORMING A PLURALITY OF PRECISION RESISTORS ON SAID INSULATED BASE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |