US3243388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic building material
Assignee: Casius Corp Ltd
•
Filing: 1962-07-20
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Granted: 1966-03-29
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Expires: 1982-07-20
Abstract
No abstract record available.
Inventors
- 👤 Leo Torsten Ulfstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:57
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C08; C08J; C08J9/00; C08J9/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A BUILDING MATERIAL CONSISTING ESSENTIALLY OF EXPANDED CLAY IN GRAIN FORM AS AN AGGREGATES AND A RIGID EXPANDED SYNTHETIC RESIN PLASTIC HAVING CLOSED PORES FILLING UP THE SPACED BETWEEN SAID GRAINS AND CEMENTING TOGETHER SAID GRAINS, WHEREIN THE SMALLEST GRAINS HAVE A SIZE CORRESPONDING TO A DIAMETER NOT ESSENTIALLY BELOW 5 MM., AND THE FREE SPACES BETWEEN THE GRAINS ARE LARGER THAN THE SIZE OF THE PORES OF THE PLASTIC FILLING UP THESE INTERMEDIATE SPACES BETWEEN THE GRAINS.
Claim 2
Dependent Claim
78 words
A BUILDING MATERIAL CONSISTING ESSENTIALLY OF EXPANDED CLAY IN GRAIN FORM AS AN AGGREGATES AND A RIGID EXPANDED SYNTHETIC RESIN PLASTIC HAVING CLOSED PORES FILLING UP THE SPACED BETWEEN SAID GRAINS AND CEMENTING TOGETHER SAID GRAINS, WHEREIN THE SMALLEST GRAINS HAVE A SIZE CORRESPONDING TO A DIAMETER NOT ESSENTIALLY BELOW 5 MM., AND THE FREE SPACES BETWEEN THE GRAINS ARE LARGER THAN THE SIZE OF THE PORES OF THE PLASTIC FILLING UP THESE INTERMEDIATE SPACES BETWEEN THE GRAINS.
References Cited (Backward Citations)
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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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |