US2829040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petroleum pitch fertilizer and process for its preparation
Assignee: Gulf Research and Development Co
•
Filing: 1956-03-27
•
Granted: 1958-04-01
•
Expires: 1976-03-27
Abstract
No abstract record available.
Inventors
- 👤 John K Darin
- 👤 Eldon M Sutphin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:51
CPC Classifications
C; C05; C05B; C05B19/00; C05B19/02; C05G; C05G5/00; C05G5/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A FERTILIZER COMPRISING A PETROLEUM PITCH HAVING A RING AND BALL SOFTENING POINT ABOVE ABOUT 275*F. IN A HIGHLY EXPANDED POROUS CONDITION AND FERTILIZER INGREDIENTS UNIFORMLY DISSEMINATED THROUGHOUT THE PITCH.
Claim 2
Dependent Claim
30 words
A FERTILIZER COMPRISING A PETROLEUM PITCH HAVING A RING AND BALL SOFTENING POINT ABOVE ABOUT 275*F. IN A HIGHLY EXPANDED POROUS CONDITION AND FERTILIZER INGREDIENTS UNIFORMLY DISSEMINATED THROUGHOUT THE PITCH.
References Cited (Backward Citations)
US1255829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |