US2592521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonded asbestos and method of making the same
Assignee: Parker Rust Proof Co
•
Filing: 1945-09-18
•
Granted: 1952-04-08
•
Expires: 1965-09-18
Abstract
No abstract record available.
Inventors
- 👤 John S Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:39
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B12/00; C04B12/02; Y; Y10; Y10S; Y10S264/00; Y10S264/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
THE METHOD OF PRODUCING A BONDING POWDER WHICH COMPRISES FIRST DUSTING GRANULAR ZINC DIHYDROGEN PHOSPHATE WITH FINELY POWDERED MAGNESIA AND THEN GRINDING THE MIXTURE.
Claim 2
Independent Claim
24 words
THE METHOD OF PRODUCING A BONDING POWDER WHICH COMPRISES FIRST DUSTING GRANULAR ZINC DIHYDROGEN PHOSPHATE WITH FINELY POWDERED MAGNESIA AND THEN GRINDING THE MIXTURE.
References Cited (Backward Citations)
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GB233907A
Cited
GB326825A
Cited
US1953704A
Cited
US1962577A
Cited
US2341617A
Cited
US2235176A
Cited
US2230880A
Cited
US2377484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |