Patent US3272765A successfully refreshed from Google Patents.
US3272765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight concrete
Assignee: Beazer East Inc
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Filing: 1964-05-18
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Granted: 1966-09-13
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Expires: 1984-05-18
Abstract
No abstract record available.
Inventors
- 👤 Robert C Sefton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:49
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B2103/00; C04B2103/40; C04B2111/00; C04B2111/30; C04B2111/40; Y; Y10; Y10S; Y10S521/00; Y10S521/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A LOW DENSITY CONCRETE COMPOSITION HAVING AN OVEN DRY DENSITY OF 15-35 POUNDS PER CUBIC FOOT, WHICH COMPRISES A LIGHTWEIGHT AGGREGATE PHASE OF CLOSED CELLED, MULTICELLULAR EXPANDED POLYMERIC PARTICLES HAVING A DENSITY OF 1-10 POUNDS PER CUBIC FOOT AND BINDER PHASE OF HYDRAULIC CEMENT AND SURFACE ACTIVE ADDITIVE WHEREIN THE MIX RATIO OF BAG CEMENT (94 POUNDS) TO CUBIC FEET OF POLYMERIC PARTICLES IS IN A RANGE OF 1:2 TO 1:8 AND SAID
Claim 2
Dependent Claim
73 words
A LOW DENSITY CONCRETE COMPOSITION HAVING AN OVEN DRY DENSITY OF 15-35 POUNDS PER CUBIC FOOT, WHICH COMPRISES A LIGHTWEIGHT AGGREGATE PHASE OF CLOSED CELLED, MULTICELLULAR EXPANDED POLYMERIC PARTICLES HAVING A DENSITY OF 1-10 POUNDS PER CUBIC FOOT AND BINDER PHASE OF HYDRAULIC CEMENT AND SURFACE ACTIVE ADDITIVE WHEREIN THE MIX RATIO OF BAG CEMENT (94 POUNDS) TO CUBIC FEET OF POLYMERIC PARTICLES IS IN A RANGE OF 1:2 TO 1:8 AND SAID
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |