US3090693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mortar additives
Assignee: Lockheed Martin Corp
•
Filing: 1961-06-27
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Granted: 1963-05-21
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Expires: 1981-06-27
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Kelly
- 👤 Richard C Mielenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:12
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
A MORTAR MIX CONSISTING ESSENTIALY OF A HYDRAULIC CEMENT, SAND, WATER AND BETWEEN ABOUT 0.1% AND 1% BY WEIGHT OF THE CEMENT OF AN ADDITIVE COMPRISING BETWEEN ABOUT 1 PART AND 5 PARTS BY WEIGHT OF WASTE SULFITE LIQUOR SOLIDS AND BETWEEN ABOUT 1/2 PART AND 5 PARTS BY WEIGHT OF A HIGH VISCOSITY GRADE SHORT CHAIN HYDROXYALKYL CELLULOSE; SAID WASTE SULFITE LIQUOR SOLIDS CONTAINING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF LIGNOSULFONIC ACID AND SALTS THEREOF.
References Cited (Backward Citations)
US2570827A
Cited
US1141570A
Cited
US2435594A
Cited
US2655004A
Cited
US2549507A
Cited
US2927033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |