US3058520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition of hydraulic cement and polyvinyl acetate and use thereof
Assignee: Dow Chemical Co
•
Filing: 1958-07-24
•
Granted: 1962-10-16
•
Expires: 1978-07-24
Abstract
No abstract record available.
Inventors
- 👤 George W Woodard
- 👤 George H Merkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:53
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B24/00; C04B24/24; C04B24/26; C04B24/2623
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
THE PROCESS OF CEMENTING A WELL TRAVERSING AN EARTHEN FORMATION WHICH COMPRISES POSITIONING THEREIN A SETTABLE SLURRY COMPRISING BY WEIGHT 100 PARTS OF PORTLAND CEMENT, BETWEEN 2.5 AND 25 PARTS OF POLYVINYL ACE-
Claim 2
Dependent Claim
33 words
THE PROCESS OF CEMENTING A WELL TRAVERSING AN EARTHEN FORMATION WHICH COMPRISES POSITIONING THEREIN A SETTABLE SLURRY COMPRISING BY WEIGHT 100 PARTS OF PORTLAND CEMENT, BETWEEN 2.5 AND 25 PARTS OF POLYVINYL ACE-
References Cited (Backward Citations)
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Cited
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US2757737A
Cited
US2865876A
Cited
US2819239A
Cited
US2868753A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |