US3490973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing hollow bodies of fiber-reinforced plastics
Assignee: Individual
•
Filing: 1963-07-23
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Granted: 1970-01-20
•
Expires: 1983-07-23
Abstract
No abstract record available.
Inventors
- 👤 Roderich Wilhelm Graeff
- 👤 Reinecke Ludolf
- 👤 Karl Johann Reichl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:24
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0003; B29C; B29C49/00; B29C49/42; B29C49/44; B29C53/00; B29C53/22; B29C53/24; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/52; B29C70/521; B29C70/525; B29D24/00; B29D24/002; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29C49/02; B29C49/06905; B29C49/0691; B29C49/06916; B29K; B29K2105/00; B29K2105/06; B29L; B29L2023/00; B29L2023/22; B29L2031/00; B29L2031/60; B29L2031/601; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24744
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A METHOD OF PRODUCING ARTICLES FORMED WITH INTERNAL CHANNELS, FROM FIBROUS MATERIAL IMPREGNATED WITH A FLUID, CURABLE, SYNTHETIC RESIN, COMPRISING THE STEPS OF: APPLYING A FIRST LAYER OF SAID SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL ON A LAYER OF SHEET PLASTIC MATERIAL; APPLYING A SECOND LAYER OF SAID SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL ON SAID FIRST LAYER THEREOF; APPLYING A THIRD LAYER OF SAID SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL ON SAID SECOND LAYER THEREOF; APPLYING A SECOND LAYER OF SHEET PLASTIC MATERIAL ON SIAD THIRD LAYER OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL; INTRODUCING MOLDING MEANS, SPACED LATERALLY OVER THE WIDTH OF SAID LAYERS, ALTERNATELY BETWEEN SAID FIRST AND SECOND LAYERS OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL AND BETWEEN SAID SECOND AND THIRD LAYERS OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL TO EXPAND THE ARTICLE BY PRESSING SAID FIRST AND THIRD LAYERS OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL AND THE ASSOCIATED LAYERS OF SHEET PLASTIC MATERIAL AGAINST EXTERNAL MOLDING MEANS TO TRANSFORM SIAD SECOND LAYER OF SYNTHETIC RESIN IMPREGNATED FIBROUS METERIAL INTO PARTITIONS EXTENDING BETWEEN SAID FIRST AND THIRD LAYERS OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL; AND THEN CURING THE THUS FORMED CHANNELED ARTICLE.
Claim 2
Independent Claim
191 words
A METHOD OF PRODUCING ARTICLES FORMED WITH INTERNAL CHANNELS, FROM FIBROUS MATERIAL IMPREGNATED WITH A FLUID, CURABLE, SYNTHETIC RESIN, COMPRISING THE STEPS OF: APPLYING A FIRST LAYER OF SAID SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL ON A LAYER OF SHEET PLASTIC MATERIAL; APPLYING A SECOND LAYER OF SAID SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL ON SAID FIRST LAYER THEREOF; APPLYING A THIRD LAYER OF SAID SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL ON SAID SECOND LAYER THEREOF; APPLYING A SECOND LAYER OF SHEET PLASTIC MATERIAL ON SIAD THIRD LAYER OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL; INTRODUCING MOLDING MEANS, SPACED LATERALLY OVER THE WIDTH OF SAID LAYERS, ALTERNATELY BETWEEN SAID FIRST AND SECOND LAYERS OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL AND BETWEEN SAID SECOND AND THIRD LAYERS OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL TO EXPAND THE ARTICLE BY PRESSING SAID FIRST AND THIRD LAYERS OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL AND THE ASSOCIATED LAYERS OF SHEET PLASTIC MATERIAL AGAINST EXTERNAL MOLDING MEANS TO TRANSFORM SIAD SECOND LAYER OF SYNTHETIC RESIN IMPREGNATED FIBROUS METERIAL INTO PARTITIONS EXTENDING BETWEEN SAID FIRST AND THIRD LAYERS OF SYNTHETIC RESIN IMPREGNATED FIBROUS MATERIAL; AND THEN CURING THE THUS FORMED CHANNELED ARTICLE.
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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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |