Patent US3172335A successfully refreshed from Google Patents.
US3172335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power brake booster
Assignee: Motors Liquidation Co
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Filing: 1961-08-07
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Granted: 1965-03-09
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Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Frank W Brooks
- 👤 James O Helvern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:05
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; B60T13/569
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A BRAKE BOOSTER MECHANISM, INCLUDING, A FLUID PRESSURE OPERATED MOTOR INCLUDING A CASING HAVING A PRESSURE DIFFERENTIAL RESPONSIVE MOVABLE WALL SUPPORTED THEREIN INCLUDING A ROLLING DIAPHRAGM BETWEEN THE WALL AND THE CASING PROVIDING FOR RECIPROCABLE MOVEMENT OF THE WALL IN THE CASING, SAID WALL HAVING AN EXTENSION MEMBER PROJECTING FROM EACH OF OPPSOSITE SIDES THEREOF, SAID CASING HAVING AN ELASTOMERIC FLUID SEAL MEMBER IN EACH
Claim 2
Dependent Claim
65 words
A BRAKE BOOSTER MECHANISM, INCLUDING, A FLUID PRESSURE OPERATED MOTOR INCLUDING A CASING HAVING A PRESSURE DIFFERENTIAL RESPONSIVE MOVABLE WALL SUPPORTED THEREIN INCLUDING A ROLLING DIAPHRAGM BETWEEN THE WALL AND THE CASING PROVIDING FOR RECIPROCABLE MOVEMENT OF THE WALL IN THE CASING, SAID WALL HAVING AN EXTENSION MEMBER PROJECTING FROM EACH OF OPPSOSITE SIDES THEREOF, SAID CASING HAVING AN ELASTOMERIC FLUID SEAL MEMBER IN EACH
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |