US3298839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory bonding mortar
Assignee: Harbison Walker Refractories Co
•
Filing: 1965-03-23
•
Granted: 1967-01-17
•
Expires: 1985-03-23
Abstract
No abstract record available.
Inventors
- 👤 Peter T Troell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:37
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/6306; C04B35/66; C04B2111/00; C04B2111/00474; C04B2111/0087; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/34; C04B2235/3427; C04B2235/3463; C04B2235/70; C04B2235/96; C04B2235/9669; C04B2235/9676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
AN AIR SETTING PARTICULATE MORTAR MIXTURE CONSISTIING ESSENTIALLY OF, BY WEIGHT, SUFFICIENT DRY CRYSTALLINE PYROPHOSPHORIC ACID TO PROVIDE FROM ABOUT 2 TO 18% O P2O5, AND THE BALANCE A NONBASIC REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF HIGH ALUMINA MATERIALS ANALYZING AT LEAST 50% AL2O3 ON AN OXIDE BASIS AND ZIRCON SANDS.
Claim 2
Dependent Claim
53 words
AN AIR SETTING PARTICULATE MORTAR MIXTURE CONSISTIING ESSENTIALLY OF, BY WEIGHT, SUFFICIENT DRY CRYSTALLINE PYROPHOSPHORIC ACID TO PROVIDE FROM ABOUT 2 TO 18% O P2O5, AND THE BALANCE A NONBASIC REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF HIGH ALUMINA MATERIALS ANALYZING AT LEAST 50% AL2O3 ON AN OXIDE BASIS AND ZIRCON SANDS.
References Cited (Backward Citations)
US2852401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |