US3093499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement pack set inhibitor
Assignee: WR Grace and Co
•
Filing: 1961-02-02
•
Granted: 1963-06-11
•
Expires: 1981-02-02
Abstract
No abstract record available.
Inventors
- 👤 George W Blackwood
- 👤 Dunbar L Shanklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:55
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A COMPOSITION CONSISTING ESSENTIALLY OF PORTLAND CEMENT AND 0.01 AND 0.04 WEIGHT PERCENT OF TERTIARY BUTYL ACETATE INTIMATELY ADMIXED THEREWITH, SAID TERTIARY BUTYL DURING STORAGE AND TRANSPORTATION IN BULK. ACETATE REDUCING THE TENDENCY OF SAID CEMENT TO PACK SET
Claim 2
Dependent Claim
39 words
A COMPOSITION CONSISTING ESSENTIALLY OF PORTLAND CEMENT AND 0.01 AND 0.04 WEIGHT PERCENT OF TERTIARY BUTYL ACETATE INTIMATELY ADMIXED THEREWITH, SAID TERTIARY BUTYL DURING STORAGE AND TRANSPORTATION IN BULK. ACETATE REDUCING THE TENDENCY OF SAID CEMENT TO PACK SET
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |