US3372038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicate coatings
Assignee: PQ Corp
•
Filing: 1964-08-18
•
Granted: 1968-03-05
•
Expires: 1984-08-18
Abstract
No abstract record available.
Inventors
- 👤 Weldes Helmut Hans Wilhelm
- 👤 David I Netting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:40
CPC Classifications
C; C09; C09D; C09D1/00; C09D1/02; C09D1/04; C09D5/00; C09D5/08; C09D5/10; C09D5/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A CORROSION RESISTANT COATING COMPOSITION FOR METAL CONSISTING ESSENTIALLY OF: (A) AN AQUEOUS SOLUTION OF AN ORGANIC AMMONIUM SILICATE WHICH IS CHARACTERIZED BY THE FORMULA
Claim 2
Dependent Claim
25 words
A CORROSION RESISTANT COATING COMPOSITION FOR METAL CONSISTING ESSENTIALLY OF: (A) AN AQUEOUS SOLUTION OF AN ORGANIC AMMONIUM SILICATE WHICH IS CHARACTERIZED BY THE FORMULA
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |