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Patent US3350718A successfully refreshed from Google Patents.
US3350718A
Expired / Lapsed
US
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Safety helmet
Assignee: American Safety Equipment Corp
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Filing: 1966-02-10
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Granted: 1967-11-07
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Expires: 1986-02-10
Abstract
No abstract record available.
Inventors
- 👤 Daniel D Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:22
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/06; A42B3/062; A42B3/063; Y; Y10; Y10S; Y10S2/00; Y10S2/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A SAFETY HELMET COMPRISING: A THIN LIGHTWEIGHT, SEMI-FLEXIBLE, SUBSTANTIALLY HEMISPHERICAL, OUTER SHELL; A THIN LIGHTWEIGHT, SEMI-FLEXIBLE INNER SHELL, SUBSTANTIALLY CONCENTRIC WITH SAID OUTER SHELL; A RESILIENTLY COMPRESSIBLE, SHOCK ABSORBING LINER SANDWICHED BETWEEN SAID INNER SHELL OUTER SHELL; A STIFF REINFORCING SHELL SANDWICHED BETWEEN SAID OUTER SHELL AND SHOCK ABSORBING LINER; MEANS SECURING SAID OUTER SHELL AND SAID INNER SHELL TOGETHER ADJACENT THEIR LOWER RIMS AND BEING OTHERWISE FREE TO FLOAT RELATIVE TO EACH OTHER; SAID SHOCK ABSORBER LINER AND SAID REINFORCING SHELL BEING FREE OF POSITIVE SECUREMENT AND BEING FRICTIONALLY CLAMPED IN PLACE.
Claim 2
Dependent Claim
93 words
A SAFETY HELMET COMPRISING: A THIN LIGHTWEIGHT, SEMI-FLEXIBLE, SUBSTANTIALLY HEMISPHERICAL, OUTER SHELL; A THIN LIGHTWEIGHT, SEMI-FLEXIBLE INNER SHELL, SUBSTANTIALLY CONCENTRIC WITH SAID OUTER SHELL; A RESILIENTLY COMPRESSIBLE, SHOCK ABSORBING LINER SANDWICHED BETWEEN SAID INNER SHELL OUTER SHELL; A STIFF REINFORCING SHELL SANDWICHED BETWEEN SAID OUTER SHELL AND SHOCK ABSORBING LINER; MEANS SECURING SAID OUTER SHELL AND SAID INNER SHELL TOGETHER ADJACENT THEIR LOWER RIMS AND BEING OTHERWISE FREE TO FLOAT RELATIVE TO EACH OTHER; SAID SHOCK ABSORBER LINER AND SAID REINFORCING SHELL BEING FREE OF POSITIVE SECUREMENT AND BEING FRICTIONALLY CLAMPED IN PLACE.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |