Patent US3487479A successfully refreshed from Google Patents.
Patent US4008544A successfully refreshed from Google Patents.
US4008544A
Expired / Lapsed
US
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Plastic planting container
Assignee: Dow Chemical Co
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Filing: 1975-09-08
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Granted: 1977-02-22
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Expires: 1995-09-08
Abstract
Abstract A plastic container for planting tree seedlings in a mechanized process, and being in the shape of a projectile suitable for penetration into soil. The planting container is highly oriented in its longitudinal direction with a number of longitudinal grooves positioned on the inside, outside or both sides thereof. The grooves include slits and holes to permit drainage, egress of growing roots, and aiding in the self-destruction of the container after being injected into the ground with a seedling. The self-destruction can be further promoted by the use of stress cracking agents within the plastic material comprising the planting container.
Inventors
- 👤 Walter E. F. Rupprecht
- 👤 Eckel R. Lane
- 👤 Joseph W. Rakshys, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:47
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/02; A01G9/029; A01G9/0291; Y; Y10; Y10S; Y10S220/00; Y10S220/30; Y10S260/00; Y10S260/43; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
An elongated thermoplastic planting container having one end generally pointed and an opposite end open for receiving soil and seedling, said container formed with substantial orientation strength in its longitudinal direction and with a lack of substantial orientation strength in the transverse direction, and a plurality of openings extending longitudinally along the container sidewall to further weaken the container in said transverse direction.
Claim 2
Dependent Claim
63 words
An elongated thermoplastic planting container having one end generally pointed and an opposite end open for receiving soil and seedling, said container formed with substantial orientation strength in its longitudinal direction and with a lack of substantial orientation strength in the transverse direction, and a plurality of openings extending longitudinally along the container sidewall to further weaken the container in said transverse direction.
Claim 3
Dependent Claim
15 words
The planting container of claim 1 wherein the opposite ends of said opening are pointed.
Claim 4
Dependent Claim
28 words
The planting container of claim 1 wherein at least one hole is located adjacent the generally pointed end thereof to permit moisture evacuation and ingress, and root egress.
Claim 5
Dependent Claim
26 words
The planting container of claim 1 wherein the container is formed from a polystyrene resin material impregnated with a stress cracking agent to aid self-destruction thereof.
Claim 6
Dependent Claim
13 words
The planting container of claim 1 wherein the container is circular in cross-section.
Claim 7
Dependent Claim
13 words
The planting container of claim 1 wherein the container is rectangular in cross-section.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |