Patent US2956916A successfully refreshed from Google Patents.
US2956916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helmet shell and method of making it
Assignee: MSA Safety Inc
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Filing: 1958-07-01
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Granted: 1960-10-18
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Expires: 1978-07-01
Abstract
No abstract record available.
Inventors
- 👤 Donald J Voss
- 👤 Theodore Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:35
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/06; A42B3/062; A42B3/063; A42C; A42C2/00; A42C2/005; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/28; B29C70/30; B29C70/34; B29C70/345; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0809; B29K2105/0854; B29L; B29L2031/00; B29L2031/48; B29L2031/4807; B29L2031/4814; B29L2031/4821; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044; Y10T156/1048; Y10T156/1052; Y10T156/1062; Y10T156/1075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
THE METHOD OF MAKING A HELMET SHELL, COMPRISING IMPREGNATING COTTON FABRIC, GLASS FABRIC AND A MAT OF RANDOM GLASS FIBERS WITH THERMOSETTING RESIN, CUTTING FROM THE COTTON FABRIC THREE BLANKS OF SUBSTANTIALLY THE SIZE OF THE HELMET, CUTTING FROM EACH OF THE COTTON AND GLASS FABRICS A DISC THAT IS MATERIALLY SMALLER THAN SAID BLANKS, CUTTING FROM THE GLASS FABRIC A RING HAVING SUBSTANTIALLY THE SAME OUTER DIAMETER AS SAID BLANKS, PLACING A COTTON FABRIC BLANK IN A MOLD CAVITY FOLLOWEED BY THE GLASS FABRIC DISC, A PERVIOUS SCREEN OF SUBSTANTIALLY THE SAME SIZE AS SAID BLANKS AND CONTAINING WIRE, THE COTTON FABRIC DISC, ANOTHER COTTON FABRIC BLANK, THE GLASS MAT, THE THIRD COTTON FABRIC BLANK AND THE GLASS FABRICC RING, AND THEN APPLYING HEAT AND PRESSURE TO THE LAYERS OF MATERIAL IN THE MOLD TO SET THE RESIN AND BOND THEM TOGETHER INTO A STRONG LAMINATE WITH THE GLASS MAT EXTENDING THROUGHOUT AT LEAST THE MAJOR AREA OF THE SHELL.
Claim 2
Independent Claim
161 words
THE METHOD OF MAKING A HELMET SHELL, COMPRISING IMPREGNATING COTTON FABRIC, GLASS FABRIC AND A MAT OF RANDOM GLASS FIBERS WITH THERMOSETTING RESIN, CUTTING FROM THE COTTON FABRIC THREE BLANKS OF SUBSTANTIALLY THE SIZE OF THE HELMET, CUTTING FROM EACH OF THE COTTON AND GLASS FABRICS A DISC THAT IS MATERIALLY SMALLER THAN SAID BLANKS, CUTTING FROM THE GLASS FABRIC A RING HAVING SUBSTANTIALLY THE SAME OUTER DIAMETER AS SAID BLANKS, PLACING A COTTON FABRIC BLANK IN A MOLD CAVITY FOLLOWEED BY THE GLASS FABRIC DISC, A PERVIOUS SCREEN OF SUBSTANTIALLY THE SAME SIZE AS SAID BLANKS AND CONTAINING WIRE, THE COTTON FABRIC DISC, ANOTHER COTTON FABRIC BLANK, THE GLASS MAT, THE THIRD COTTON FABRIC BLANK AND THE GLASS FABRICC RING, AND THEN APPLYING HEAT AND PRESSURE TO THE LAYERS OF MATERIAL IN THE MOLD TO SET THE RESIN AND BOND THEM TOGETHER INTO A STRONG LAMINATE WITH THE GLASS MAT EXTENDING THROUGHOUT AT LEAST THE MAJOR AREA OF THE SHELL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |