US3187989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum system
Assignee: Yale and Towne Inc
•
Filing: 1962-11-19
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Granted: 1965-06-08
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Expires: 1982-11-19
Abstract
No abstract record available.
Inventors
- 👤 William J Barto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:20
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF SUPPLYING AIR AT SUB-ATMOSPHERIC PRESSURE TO A VACUUM DEVICE BY MEANS OF AN INTERNAL COMBUSTION ENGINE OPERABLE AT A PARTICULAR SUB-ATMOSPHERIC PRESSURE COMPRISING, CONNECTING THE VACUUM DEVICE WITH THE AIR INTAKE OF SAID INTERNAL COMBUSTION ENGINE WHEREBY THE LARGE VOLUME OF AIR DRAWN THROUGH SAID AIR INTAKE MAY BE UTILIZED TO CREATE VACUUM FOR SAID VACUUM DEVICE, OPERATING THE ENGINE WHEREBY A LARGE VOLUME FOR AIR IS DRAWN THROUGH THE AIR INTAKE OF THE ENGINE, AND
Claim 2
Independent Claim
79 words
THE METHOD OF SUPPLYING AIR AT SUB-ATMOSPHERIC PRESSURE TO A VACUUM DEVICE BY MEANS OF AN INTERNAL COMBUSTION ENGINE OPERABLE AT A PARTICULAR SUB-ATMOSPHERIC PRESSURE COMPRISING, CONNECTING THE VACUUM DEVICE WITH THE AIR INTAKE OF SAID INTERNAL COMBUSTION ENGINE WHEREBY THE LARGE VOLUME OF AIR DRAWN THROUGH SAID AIR INTAKE MAY BE UTILIZED TO CREATE VACUUM FOR SAID VACUUM DEVICE, OPERATING THE ENGINE WHEREBY A LARGE VOLUME FOR AIR IS DRAWN THROUGH THE AIR INTAKE OF THE ENGINE, AND
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |