US3477979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy containing concrete
Assignee: Shell USA Inc
•
Filing: 1965-11-26
•
Granted: 1969-11-11
•
Expires: 1985-11-26
Abstract
No abstract record available.
Inventors
- 👤 Martin J Hillyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:29
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2861011A
Cited
US3062771A
Cited
GB950298A
Cited
US3304344A
Cited
US3310511A
Cited
US3284400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |