US3206532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for casting cement tanks
Assignee: MC Nottingham Co
•
Filing: 1963-06-24
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Granted: 1965-09-14
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Mark C Nottingham
- 👤 James J Spear
- 👤 Ernest L Grasty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:03
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/28; B28B7/30; B28B7/303; B28B7/16; B28B7/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A METHOD FOR CASTING A CONCRETE TANK THAT HAS OPPOSITELY BULGED SIDES, SAID METHOD CONSISTING IN (A) POURING CONCRETE AROUND AN INNER FORM THAT HAS CONTINUOUS CONVEX SIDES AND SECTIONAL ENDS, (B) LOOSENING SECTIONS OF SAID ENDS AND ONE OF SAID SIDES FROM ONE OF THE INNER CONCAVE SURFACES OF THE TANK AFTER THE CONCRETE HAS SET WHILE RAISING THE TANK WHICH INITIALLY LOOSELY RETAINS ASSEMBLY OF SAID LOOSENED SECTIONS AND SIDE, (C) RAISING THE TANK SUFFICIENTLY TO ALLOW THE LOOSENED FORM SECTIONS TO GRAVITATIONALLY RETURN TO THEIR INITIAL TANK-CASTING POSITION WHILE CONTINUING RAISING MOVEMENT OF THE TANK, (D) LOOSENING ADDITIONAL SECTIONS OF SAID SECTIONAL END AND THE OTHER CONVEX SIDE FROM THE OTHER INNER CONCAVE SURFACE OF THE TANK WHILE CONTINUING TO RAISE THE TANK AND WHILE LOOSELY RETAINING ASSEMBLY OF THE LATTER END SECTIONS AND CONVEX SIDE, AND (E) ALLOWING SAID ADDITIONAL SECTIONS AND SIDE TO GRAVITATIONALLY RETURN TO THEIR INITIAL TANK-CASTING POSITION.
Claim 2
Independent Claim
155 words
A METHOD FOR CASTING A CONCRETE TANK THAT HAS OPPOSITELY BULGED SIDES, SAID METHOD CONSISTING IN (A) POURING CONCRETE AROUND AN INNER FORM THAT HAS CONTINUOUS CONVEX SIDES AND SECTIONAL ENDS, (B) LOOSENING SECTIONS OF SAID ENDS AND ONE OF SAID SIDES FROM ONE OF THE INNER CONCAVE SURFACES OF THE TANK AFTER THE CONCRETE HAS SET WHILE RAISING THE TANK WHICH INITIALLY LOOSELY RETAINS ASSEMBLY OF SAID LOOSENED SECTIONS AND SIDE, (C) RAISING THE TANK SUFFICIENTLY TO ALLOW THE LOOSENED FORM SECTIONS TO GRAVITATIONALLY RETURN TO THEIR INITIAL TANK-CASTING POSITION WHILE CONTINUING RAISING MOVEMENT OF THE TANK, (D) LOOSENING ADDITIONAL SECTIONS OF SAID SECTIONAL END AND THE OTHER CONVEX SIDE FROM THE OTHER INNER CONCAVE SURFACE OF THE TANK WHILE CONTINUING TO RAISE THE TANK AND WHILE LOOSELY RETAINING ASSEMBLY OF THE LATTER END SECTIONS AND CONVEX SIDE, AND (E) ALLOWING SAID ADDITIONAL SECTIONS AND SIDE TO GRAVITATIONALLY RETURN TO THEIR INITIAL TANK-CASTING POSITION.
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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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |