US2999780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of casting tubular articles
Assignee: H D BOGGS CO Ltd
•
Filing: 1953-11-13
•
Granted: 1961-09-12
•
Expires: 1973-11-13
Abstract
No abstract record available.
Inventors
- 👤 Perrault Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:22
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/44; B29C70/446; B29C70/30; B29C70/32; B29C70/323; B29C70/326; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29L; B29L2023/00; B29L2023/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF CASTING FIBROUSLY REINFORCED TUBULAR ARTICLES OF SETTABLE MATERIAL COMPRISING: INTRODUCING A TUBULAR FORMATION OF FIBROUS REINFORCING MATERIAL INTO A HORIZONTALLY DISPOSED TUBULAR MOLD MOUNTED FOR ROTATION ABOUT ITS LONGITUDINAL AXIS; INTRODUCING A MEASURE OF SETTABLE MATERIAL INTO THE MOLD; SPINNING THE MOLD AND ITS CONTENTS TO EVENLY DISTRIBUTE THE SETTABLE MATERIAL THROUGH THE REINFORCING MATERIAL; INSERTING A RADIALLY INFLATABLE EXPANSIBLE MANDREL INTO THE LUMEN DEFINED BY THE MOLD AND ITS CONTENTS; INFLATING THE EXPANSIBLE MANDREL TO BRING ITS PERIPHERAL SURFACE INTO CONTACT WITH THE CONTENTS OF THE MOLD; FURTHER EXPANDING THE MANDREL AGAINST THE INNER SURFACE OF THE CONTENTS OF THE MOLD WHILE THE MOLD IS SPINNING; AND CURING THE SETTABLE MATERIAL TO AT LEAST A NON-FLOWABLE STATE WHILE THE MANDREL IS SO APPLIED.
Claim 2
Independent Claim
127 words
THE METHOD OF CASTING FIBROUSLY REINFORCED TUBULAR ARTICLES OF SETTABLE MATERIAL COMPRISING: INTRODUCING A TUBULAR FORMATION OF FIBROUS REINFORCING MATERIAL INTO A HORIZONTALLY DISPOSED TUBULAR MOLD MOUNTED FOR ROTATION ABOUT ITS LONGITUDINAL AXIS; INTRODUCING A MEASURE OF SETTABLE MATERIAL INTO THE MOLD; SPINNING THE MOLD AND ITS CONTENTS TO EVENLY DISTRIBUTE THE SETTABLE MATERIAL THROUGH THE REINFORCING MATERIAL; INSERTING A RADIALLY INFLATABLE EXPANSIBLE MANDREL INTO THE LUMEN DEFINED BY THE MOLD AND ITS CONTENTS; INFLATING THE EXPANSIBLE MANDREL TO BRING ITS PERIPHERAL SURFACE INTO CONTACT WITH THE CONTENTS OF THE MOLD; FURTHER EXPANDING THE MANDREL AGAINST THE INNER SURFACE OF THE CONTENTS OF THE MOLD WHILE THE MOLD IS SPINNING; AND CURING THE SETTABLE MATERIAL TO AT LEAST A NON-FLOWABLE STATE WHILE THE MANDREL IS SO APPLIED.
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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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |