US2709845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying pressure to the surface of newly formed concrete or like cementitious products
Assignee: Rocla Pipes Ltd
•
Filing: 1952-05-28
•
Granted: 1955-06-07
•
Expires: 1972-05-28
Abstract
No abstract record available.
Inventors
- 👤 Serkin Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/92; B28B21/94; B28B21/56; B28B21/60; Y; Y10; Y10S; Y10S264/00; Y10S264/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE METHOD OF FORMING CONCRETE STRUCTURES COMPRISING APPLYING AN AQUEOUS SOLUTION OF AT LEAST ONE WATERSOLUBLE SALT OF ALGINIC ACID TO A SURFACE OF AN UNHARDENED CALCAREOUS CONCRETE STRUCTURE CONTAINED WITHIN A MOLD, ALLOWING SAID SOLUTION TO REACT WITH SAID SURFACE TO FORM A SUBSTANTIALLY FLUID-TIGHT WATER-INSOLUBLE FILM ON SAID SURFACEE AND THEN DIRECTLY APPLYING A FLUID UNDER PRESSURE TO SAID SURFACE TO COMPRESS SAID CONCRETE STRUCTURE WITHIN SAID MOLD.
Claim 2
Independent Claim
70 words
THE METHOD OF FORMING CONCRETE STRUCTURES COMPRISING APPLYING AN AQUEOUS SOLUTION OF AT LEAST ONE WATERSOLUBLE SALT OF ALGINIC ACID TO A SURFACE OF AN UNHARDENED CALCAREOUS CONCRETE STRUCTURE CONTAINED WITHIN A MOLD, ALLOWING SAID SOLUTION TO REACT WITH SAID SURFACE TO FORM A SUBSTANTIALLY FLUID-TIGHT WATER-INSOLUBLE FILM ON SAID SURFACEE AND THEN DIRECTLY APPLYING A FLUID UNDER PRESSURE TO SAID SURFACE TO COMPRESS SAID CONCRETE STRUCTURE WITHIN SAID MOLD.
References Cited (Backward Citations)
US2585446A
Cited
US2432688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |