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US2931724A
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Correction fluid and method for correcting blueprints
Assignee: Individual
•
Filing: 1956-10-22
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Granted: 1960-04-05
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Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Oscar D Lantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A COMPOSITION FOR CORRECTING CYANOTYPE PRINTS COMPRISING AN ADMIXTURE OF GUM ARABIC, SODIUM BENZOATE, TARTRAZINE, LEAD CHROMATE, LEAD SULFATE, BARIUM SULFATE, POTASSIUM OXALATE AND WATER.
Claim 2
Dependent Claim
25 words
A COMPOSITION FOR CORRECTING CYANOTYPE PRINTS COMPRISING AN ADMIXTURE OF GUM ARABIC, SODIUM BENZOATE, TARTRAZINE, LEAD CHROMATE, LEAD SULFATE, BARIUM SULFATE, POTASSIUM OXALATE AND WATER.
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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |