Patent US3151995A successfully refreshed from Google Patents.
US3151995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for inhibiting the setting of cementitious compositions
Assignee: Individual
•
Filing: 1960-12-19
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Granted: 1964-10-06
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Expires: 1980-12-19
Abstract
No abstract record available.
Inventors
- 👤 John L Nemeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:08
CPC Classifications
C; C04; C04B; C04B40/00; C04B40/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD FOR HANDLING AN HYDRAULIC CEMENTITIOUS COMPOSITION WHICH COMPRISES AT AMBIENT TEMPERATURE FORMING A SLURRY CONSISTING ESSENTIALLY OF WATER AND PORTLAND CEMENT, APPLYING A VACUUM TO SAID SLURRY BEFORE SAID SLURRY HARDENS AND MAINTAINING SAID SLURRY AT AMBIENT TEMPERATURE UNDER VACUUM AT AN ABSOLUTE PRESSURE ABOVE THAT AT WHICH WATER EVAPORATES FOR A PERIOD OF AT LEAST A DAY, WHEREBY SAID SLURRY REMAINS WORKABLE WHILE MAINTAINED UNDER VACUUM.
Claim 2
Independent Claim
69 words
A METHOD FOR HANDLING AN HYDRAULIC CEMENTITIOUS COMPOSITION WHICH COMPRISES AT AMBIENT TEMPERATURE FORMING A SLURRY CONSISTING ESSENTIALLY OF WATER AND PORTLAND CEMENT, APPLYING A VACUUM TO SAID SLURRY BEFORE SAID SLURRY HARDENS AND MAINTAINING SAID SLURRY AT AMBIENT TEMPERATURE UNDER VACUUM AT AN ABSOLUTE PRESSURE ABOVE THAT AT WHICH WATER EVAPORATES FOR A PERIOD OF AT LEAST A DAY, WHEREBY SAID SLURRY REMAINS WORKABLE WHILE MAINTAINED UNDER VACUUM.
References Cited (Backward Citations)
GB328030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |