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Patent US2979415A successfully refreshed from Google Patents.
US2979415A
Expired / Lapsed
US
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Cementitious material
Assignee: BPB Ltd
•
Filing: 1958-02-11
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Granted: 1961-04-11
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Expires: 1978-02-11
Abstract
No abstract record available.
Inventors
- 👤 Taylor John Boris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:29
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; C04B28/141; C04B11/00; C04B11/28; C04B11/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A CEMENTITIOUS MATERIAL IN THE FORM OF CELLULAR GRANULAR PARTICLES, SAID PARTICLES CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF SOLUBLE ANHYDRITE AND CALCIUM SULPHATE HEMIHYDRATE.
Claim 2
Dependent Claim
35 words
A CEMENTITIOUS MATERIAL IN THE FORM OF CELLULAR GRANULAR PARTICLES, SAID PARTICLES CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF SOLUBLE ANHYDRITE AND CALCIUM SULPHATE HEMIHYDRATE.
References Cited (Backward Citations)
USRE18739E
Cited
US2322194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |