US3228410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pulse width modulation
Assignee: Individual
•
Filing: 1963-09-30
•
Granted: 1966-01-11
•
Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Warren
- 👤 Elmer L Swartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:51
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/08; F15C1/22; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125; Y10T137/2142; Y10T137/2147; Y10T137/2158; Y10T137/2229; Y10T137/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PURE FLUID PULSE WIDTH MODULATION SYSTEM COMPRISING: (A) A BISTABLE FLUID AMPLIFIER; (B) MEANS FOR SUPPLYING REGULAR PERIODIC FLUID SIGNALS TO THE CONTROLS OF SAID AMPLIFIER TO PRODUCE A CONSTANT FREQUENCY DIGITAL PULSE OUTPUT OF SAID AMPLIFIER; (C) MEANS FOR APPLYING FLUID ANALOG CONTROL SIGNALS TO SAID AMPLIFIER; (D) SAID ANALOG CONTROL SIGNALS BEING COMBINED WITH SAID PERIODIC SIGNALS TO PROVIDE WIDTH MODULATION OF SAID CONSTANT FREQUENCY DIGITAL OUTPUT, WHEREBY;
Claim 2
Dependent Claim
71 words
A PURE FLUID PULSE WIDTH MODULATION SYSTEM COMPRISING: (A) A BISTABLE FLUID AMPLIFIER; (B) MEANS FOR SUPPLYING REGULAR PERIODIC FLUID SIGNALS TO THE CONTROLS OF SAID AMPLIFIER TO PRODUCE A CONSTANT FREQUENCY DIGITAL PULSE OUTPUT OF SAID AMPLIFIER; (C) MEANS FOR APPLYING FLUID ANALOG CONTROL SIGNALS TO SAID AMPLIFIER; (D) SAID ANALOG CONTROL SIGNALS BEING COMBINED WITH SAID PERIODIC SIGNALS TO PROVIDE WIDTH MODULATION OF SAID CONSTANT FREQUENCY DIGITAL OUTPUT, WHEREBY;
References Cited (Backward Citations)
US3159168A
Cited
US3158166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |