US3306029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Invertible timers
Assignee: Individual
•
Filing: 1965-08-06
•
Granted: 1967-02-28
•
Expires: 1985-08-06
Abstract
No abstract record available.
Inventors
- 👤 Jon L Liljequist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:40
CPC Classifications
G; G04; G04F; G04F1/00; G04F1/04; G04F1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A TIMER, COMPRISING; A MAIN BODY HAVING AN ENCLOSED AND ELONGATE INTERNAL VOID DEFINED AT EACH ENC THEREOF BY A PAIR OF SPACED APART WALL AREAS; MASS MEANS HAVING A CENTER OF GRAVITY MOVABLY CONTAINED IN SAID VOID FOR MOVEMENT BETWEEN SAID SPACED APART WALL AREAS UNDER THE INFLUENCE OF GRAVITY; MEANS BETWEEN SAID END WALL AREAS FOR RETARDING THE FREE MOVEMENT OF SAID MASS MEANS BETWEEN SAID SPACED APART WALL AREAS, THEREBY PROVIDING A METERED MOVEMENT OF SAID MASS MEANS; AND LIMITED STABILITY SUPPORT MEANS FOR SUPPORTING THE LOWERMOST PORTIONS OF SAID MAIN BODY IN A STABLE POSITION BOTH WITH SAID ELONGATED INTERNAL VOID TILTED AT AN ANGLE FROM THE VERTICAL AND WITH SAID CENTER OF GRAVITY LOCATED ABOVE AND TO THE SIDE OF ITS LOWERMOST POSITION, SAID SUPPORT MEANS BEING OF LIMITED DIMENSIONS IN THE HORIZONTAL DIRECTION OF MOVEMENT OF SAID MASS MEANS SO AS TO LOSE ITS STABLE SUPPORT OF THE TIMER AS SAID CENTER OF GRAVITY APPROACHES ITS LOWERMOST POSITION THEREBY CAUSING SAID TIMER TO TILT AND THUS INDICATE THE PASSAGE OF SOME PREDETERMINED PERIOD OF TIME.
Claim 2
Dependent Claim
181 words
A TIMER, COMPRISING; A MAIN BODY HAVING AN ENCLOSED AND ELONGATE INTERNAL VOID DEFINED AT EACH ENC THEREOF BY A PAIR OF SPACED APART WALL AREAS; MASS MEANS HAVING A CENTER OF GRAVITY MOVABLY CONTAINED IN SAID VOID FOR MOVEMENT BETWEEN SAID SPACED APART WALL AREAS UNDER THE INFLUENCE OF GRAVITY; MEANS BETWEEN SAID END WALL AREAS FOR RETARDING THE FREE MOVEMENT OF SAID MASS MEANS BETWEEN SAID SPACED APART WALL AREAS, THEREBY PROVIDING A METERED MOVEMENT OF SAID MASS MEANS; AND LIMITED STABILITY SUPPORT MEANS FOR SUPPORTING THE LOWERMOST PORTIONS OF SAID MAIN BODY IN A STABLE POSITION BOTH WITH SAID ELONGATED INTERNAL VOID TILTED AT AN ANGLE FROM THE VERTICAL AND WITH SAID CENTER OF GRAVITY LOCATED ABOVE AND TO THE SIDE OF ITS LOWERMOST POSITION, SAID SUPPORT MEANS BEING OF LIMITED DIMENSIONS IN THE HORIZONTAL DIRECTION OF MOVEMENT OF SAID MASS MEANS SO AS TO LOSE ITS STABLE SUPPORT OF THE TIMER AS SAID CENTER OF GRAVITY APPROACHES ITS LOWERMOST POSITION THEREBY CAUSING SAID TIMER TO TILT AND THUS INDICATE THE PASSAGE OF SOME PREDETERMINED PERIOD OF TIME.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |