US2854368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective coatings for metals
Assignee: Individual
•
Filing: 1956-10-31
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Granted: 1958-09-30
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Expires: 1976-10-31
Abstract
No abstract record available.
Inventors
- 👤 Shreir Louis Lionel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:02
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A SOLUTION FOR FORMING PROTECTIVE COATINGS ON METALS, COMPRISING PHOSPHORIC ACID OF 1 TO 8 MOLES CONCENTRATION, AND AT LEAST OE TANNIN MATERIAL IN A PROPORTION OF BETWEEN 1 AND 35% BY WEIGHT BASED ON SAID SOLUTION.
Claim 2
Dependent Claim
37 words
A SOLUTION FOR FORMING PROTECTIVE COATINGS ON METALS, COMPRISING PHOSPHORIC ACID OF 1 TO 8 MOLES CONCENTRATION, AND AT LEAST OE TANNIN MATERIAL IN A PROPORTION OF BETWEEN 1 AND 35% BY WEIGHT BASED ON SAID SOLUTION.
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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |