Patent US3526530A successfully refreshed from Google Patents.
US3526530A
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US
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Siliceous coatings
Assignee: PQ Corp
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Filing: 1967-04-12
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Granted: 1970-09-01
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Expires: 1987-04-12
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sams
- 👤 Robert W Linton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:01
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5076; C04B41/5089; C03; C03C; C03C17/00; C03C17/22; C04B41/4505; C03C2217/00; C03C2217/20; C03C2217/28; C03C2218/00; C03C2218/10; C03C2218/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3301701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |