US2846294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etching bath
Assignee: Mergenthaler Linotype GmbH
•
Filing: 1956-10-08
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Granted: 1958-08-05
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Robert G Patterson
- 👤 Yamada Yoshikazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:51
CPC Classifications
C; C10; C10G; C10G15/00; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
AN ETCHING BATH COMPRISING AN AQUEOUS DISPERSION CONTAINING NITRIC ACID, FROM 0.2 TO 2.5% OF A WATERSOLUBLE SALT OF A TETRADECYL SULFATE, AND FROM 1 TO 75% OF A WATER-IMMISCIBLE LIQUID PETROLEUM FRACTION BOILING IN THE RANGE FROM 70 TO 390*C.
Claim 2
Dependent Claim
41 words
AN ETCHING BATH COMPRISING AN AQUEOUS DISPERSION CONTAINING NITRIC ACID, FROM 0.2 TO 2.5% OF A WATERSOLUBLE SALT OF A TETRADECYL SULFATE, AND FROM 1 TO 75% OF A WATER-IMMISCIBLE LIQUID PETROLEUM FRACTION BOILING IN THE RANGE FROM 70 TO 390*C.
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |